Question
Question 1
Which of the following substances is most acidic?
a
rain water with a pH of 5.5
b
sea water with a pH of 8.0
c
blood with a pH of 7.4
d
bleach with a pH of 13.0
Question 2
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.223
b.88
c.Ac
d.89
e.Alpha Decay
f.224
g.Gamma Decay
h.Beta Decay
i.222
j.86
k.Fr
l.Ra
m.87
Question 3
Before taking the Unit 5: Nuclear Processes Test, you were asked to review resources from the Unit 5: Nuclear Processes Resource Guide.
Below, list the two resources you reviewed and one thing you learned from each. At least two sentences per resource for your explanation.
**This is a required question - not bonus points. If you leave it unanswered, your test score will be impacted.**
Your answer:
Question 4
Nuclear reactions always involve lots of energy.
True
False
Question 5
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the atomic symbol of the new atom?:
What is the atomic symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.98
b.97
c.99
d.Es
e.96
f.Alpha Decay
g.Cf
h.Beta Decay
i.Pu
j.247
k.252
l.Gamma Decay
m.Bk
n.251
Question 6
Why does the chloride ion have a -1 charge?
a
Chlorine atoms have no electrons.
b
Chlorine atoms lose an electron.
c
Chlorine atoms share electrons.
d
Chlorine atoms gain an electron.
Question 7
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.Alpha Decay
b.U
c.94
d.251
e.Pu
f.Cm
g.247
h.Beta Decay
i.243
j.Cf
k.Gamma Decay
l.96
m.248
n.98
Question 8
What kind of nuclear reaction does the picture show?
a
Nuclear Fission
b
Nuclear Fusion
Question 9
The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
a
50 g
b
25 g
c
100 g
d
75 g
Question 10
Match the part of the diagram to its correct label.
Column A
1.
W:
W
2.
X:
X
3.
Y:
Y
4.
Z:
Z
Column B
a.Electron
b.Neutron
c.Proton
d.Nucleus
Question 11
The graph shows the radioactive decay of a bone that is found to contain 1/8 of the carbon-14 found in living animals today.
Approximately how old is the bone?
a
17,190 years
b
11,460 years
c
22,920 years
d
5,730 years
Question 12
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.Beta Decay
b.101
c.Gamma Decay
d.100
e.253
f.Fm
g.Md
h.251
i.252
j.Alpha Decay
k.99
l.248
m.Es
Question 13
Which of the following BEST describes what occurs in a fusion reaction?
a
Two low mass nuclei are joined to form one nucleus and gives off energy.
b
A single nucleus divides into two or more nuclei and gives off energy.
c
Electrons are shared between the nuclei.
d
A chemical reaction occurs between the nuclei.
Question 14
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.84
b.Rn
c.86
d.220
e.88
f.Alpha Decay
g.Ra
h.Gamma Decay
i.90
j.224
k.Th
l.Beta Decay
m.228
Question 15
Which process occurs when one nucleus splits to form two smaller nuclei?
a
fusion
b
fission
c
both
d
neither
Click here to access a Periodic Table to help you on this test.
Question 16
If a balloon is taken outside on a very cold day, what will occur?
a
The pressure inside the balloon will increase.
b
The volume of the balloon will decrease.
c
Gas will flow into the balloon.
d
The volume of the balloon will increase.
Question 17
Match the description of nuclear decay to the type of nuclear decay.
Column A
1.
:
2.
:
3.
:
4.
Has a mass of 4, positively charged: +2:
Has a mass of 4, positively charged: +2
5.
A negatively charged electron:
A negatively charged electron
6.
An energy wave:
An energy wave
Column B
a.Beta
b.Alpha
c.Gamma
Question 18
Which process occurs when two nuclei come together to form one bigger nucleus?
a
fusion
b
fission
c
both
d
neither
Question 19
What kind of nuclear reaction does the picture show?
a
Nuclear Fusion
b
Nuclear Fission
Question 20
Which factor explains why a cube of sugar placed in water will dissolve at a slower rate than granular sugar over time?
a
The cube has a smaller surface area.
b
The temperature of the cube decreases.
c
The mass of the cube decreases.
d
The particles in the cube have more movement.
Question 21
In the element above the mass number is and the atomic number is .
Blank 1:
Blank 2:
Question 22
Chemical equations must be balanced because
a
the mass of the products is always greater than the mass of the reactants.
b
mass is determined by a chemical reaction.
c
mass can neither be created nor destroyed.
d
the mass of the reactants is always greater than the mass of the products.
Question 23
Compared to an ordinary chemical reaction, a fission reaction will:
a
absorb a smaller amount of energy.
b
release a larger amount of energy.
c
absorb a larger amount of energy.
d
release a smaller amount of energy.
Question 24
When we write nuclear reactions, you use the A-Z-X formatting. Match the symbols to the terms they represent.
Column A
1.
A:
A
2.
Z:
Z
3.
X:
X
Column B
a.Atomic Number
b.Atomic Symbol
c.Atomic Mass
Question 25
Technetium-99m is a radioactive isotope commonly used in medicine as a radioactive tracer. A radioactive tracer is an isotope injected into the body to help create images for diagnosis of health problems. Technetium-99m has a half-life of 6 hours. If a patient receives a dose of technetium-99m one morning, about what percentage of the technetium-99m will be left in the patient's body 12 hours later?
a
93.8%
b
6.25%
c
25.0%
d
12.5%
Question 26
How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?
a
two
b
eight
c
three
d
six
English
Which of the following substances is most acidic?
a
rain water with a pH of 5.5
b
sea water with a pH of 8.0
c
blood with a pH of 7.4
d
bleach with a pH of 13.0
Question 2
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.223
b.88
c.Ac
d.89
e.Alpha Decay
f.224
g.Gamma Decay
h.Beta Decay
i.222
j.86
k.Fr
l.Ra
m.87
Question 3
Before taking the Unit 5: Nuclear Processes Test, you were asked to review resources from the Unit 5: Nuclear Processes Resource Guide.
Below, list the two resources you reviewed and one thing you learned from each. At least two sentences per resource for your explanation.
**This is a required question - not bonus points. If you leave it unanswered, your test score will be impacted.**
Your answer:
Question 4
Nuclear reactions always involve lots of energy.
True
False
Question 5
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the atomic symbol of the new atom?:
What is the atomic symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.98
b.97
c.99
d.Es
e.96
f.Alpha Decay
g.Cf
h.Beta Decay
i.Pu
j.247
k.252
l.Gamma Decay
m.Bk
n.251
Question 6
Why does the chloride ion have a -1 charge?
a
Chlorine atoms have no electrons.
b
Chlorine atoms lose an electron.
c
Chlorine atoms share electrons.
d
Chlorine atoms gain an electron.
Question 7
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.Alpha Decay
b.U
c.94
d.251
e.Pu
f.Cm
g.247
h.Beta Decay
i.243
j.Cf
k.Gamma Decay
l.96
m.248
n.98
Question 8
What kind of nuclear reaction does the picture show?
a
Nuclear Fission
b
Nuclear Fusion
Question 9
The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
a
50 g
b
25 g
c
100 g
d
75 g
Question 10
Match the part of the diagram to its correct label.
Column A
1.
W:
W
2.
X:
X
3.
Y:
Y
4.
Z:
Z
Column B
a.Electron
b.Neutron
c.Proton
d.Nucleus
Question 11
The graph shows the radioactive decay of a bone that is found to contain 1/8 of the carbon-14 found in living animals today.
Approximately how old is the bone?
a
17,190 years
b
11,460 years
c
22,920 years
d
5,730 years
Question 12
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.Beta Decay
b.101
c.Gamma Decay
d.100
e.253
f.Fm
g.Md
h.251
i.252
j.Alpha Decay
k.99
l.248
m.Es
Question 13
Which of the following BEST describes what occurs in a fusion reaction?
a
Two low mass nuclei are joined to form one nucleus and gives off energy.
b
A single nucleus divides into two or more nuclei and gives off energy.
c
Electrons are shared between the nuclei.
d
A chemical reaction occurs between the nuclei.
Question 14
Given the following nuclear reaction:
Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.84
b.Rn
c.86
d.220
e.88
f.Alpha Decay
g.Ra
h.Gamma Decay
i.90
j.224
k.Th
l.Beta Decay
m.228
Question 15
Which process occurs when one nucleus splits to form two smaller nuclei?
a
fusion
b
fission
c
both
d
neither
Click here to access a Periodic Table to help you on this test.
Question 16
If a balloon is taken outside on a very cold day, what will occur?
a
The pressure inside the balloon will increase.
b
The volume of the balloon will decrease.
c
Gas will flow into the balloon.
d
The volume of the balloon will increase.
Question 17
Match the description of nuclear decay to the type of nuclear decay.
Column A
1.
:
2.
:
3.
:
4.
Has a mass of 4, positively charged: +2:
Has a mass of 4, positively charged: +2
5.
A negatively charged electron:
A negatively charged electron
6.
An energy wave:
An energy wave
Column B
a.Beta
b.Alpha
c.Gamma
Question 18
Which process occurs when two nuclei come together to form one bigger nucleus?
a
fusion
b
fission
c
both
d
neither
Question 19
What kind of nuclear reaction does the picture show?
a
Nuclear Fusion
b
Nuclear Fission
Question 20
Which factor explains why a cube of sugar placed in water will dissolve at a slower rate than granular sugar over time?
a
The cube has a smaller surface area.
b
The temperature of the cube decreases.
c
The mass of the cube decreases.
d
The particles in the cube have more movement.
Question 21
In the element above the mass number is and the atomic number is .
Blank 1:
Blank 2:
Question 22
Chemical equations must be balanced because
a
the mass of the products is always greater than the mass of the reactants.
b
mass is determined by a chemical reaction.
c
mass can neither be created nor destroyed.
d
the mass of the reactants is always greater than the mass of the products.
Question 23
Compared to an ordinary chemical reaction, a fission reaction will:
a
absorb a smaller amount of energy.
b
release a larger amount of energy.
c
absorb a larger amount of energy.
d
release a smaller amount of energy.
Question 24
When we write nuclear reactions, you use the A-Z-X formatting. Match the symbols to the terms they represent.
Column A
1.
A:
A
2.
Z:
Z
3.
X:
X
Column B
a.Atomic Number
b.Atomic Symbol
c.Atomic Mass
Question 25
Technetium-99m is a radioactive isotope commonly used in medicine as a radioactive tracer. A radioactive tracer is an isotope injected into the body to help create images for diagnosis of health problems. Technetium-99m has a half-life of 6 hours. If a patient receives a dose of technetium-99m one morning, about what percentage of the technetium-99m will be left in the patient's body 12 hours later?
a
93.8%
b
6.25%
c
25.0%
d
12.5%
Question 26
How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?
a
two
b
eight
c
three
d
six
English
Answers
Answer
picture for Question 21
9 0
BE
4
9 0
BE
4
Answered by
GPT-4o mini
Sure, let's go through each question one by one.
### Question 1
**Which of the following substances is most acidic?**
- **Answer:** a. rain water with a pH of 5.5
### Question 2
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** a. 223
- **2. Atomic number of the new atom:** j. 86
- **3. Symbol of the new atom:** c. Ac
- **4. Type of decay demonstrated:** e. Alpha Decay
### Question 3
**List the two resources you reviewed and one thing you learned from each.**
- **Answer:**
1. Nuclear Decay Chart: I learned that radioactive isotopes decay at predictable rates, which can be measured through half-lives.
2. Fission vs. Fusion Presentation: I learned the differences in energy output and processes between fusion and fission, particularly that fusion involves the combining of nuclei.
### Question 4
**Nuclear reactions always involve lots of energy.**
- **Answer:** True
### Question 5
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** c. 99
- **2. Atomic number of the new atom:** b. 97
- **3. Symbol of the new atom:** d. Es
- **4. Type of decay demonstrated:** h. Beta Decay
### Question 6
**Why does the chloride ion have a -1 charge?**
- **Answer:** d. Chlorine atoms gain an electron.
### Question 7
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** g. 247
- **2. Atomic number of the new atom:** f. 96
- **3. Symbol of the new atom:** e. Pu
- **4. Type of decay demonstrated:** a. Alpha Decay
### Question 8
**What kind of nuclear reaction does the picture show?**
- **Answer:** a. Nuclear Fission
### Question 9
**How much of element X remains after 10 days have passed?**
- **Answer:** b. 25 g (since it takes 10 days, which is two half-lives: 100g -> 50g -> 25g)
### Question 10
**Match the part of the diagram to its correct label.**
- **1. W:** c. Proton
- **2. X:** a. Electron
- **3. Y:** b. Neutron
- **4. Z:** d. Nucleus
### Question 11
**Approximately how old is the bone?**
- **Answer:** c. 22,920 years (since it is 1/8, which is 3 half-lives: 5,730 years x 3 = 17,190 years)
### Question 12
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** e. 253
- **2. Atomic number of the new atom:** b. 101
- **3. Symbol of the new atom:** f. Fm
- **4. Type of decay demonstrated:** a. Beta Decay
### Question 13
**Which BEST describes what occurs in a fusion reaction?**
- **Answer:** a. Two low mass nuclei are joined to form one nucleus and gives off energy.
### Question 14
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** d. 220
- **2. Atomic number of the new atom:** e. 88
- **3. Symbol of the new atom:** b. Rn
- **4. Type of decay demonstrated:** f. Alpha Decay
### Question 15
**Which process occurs when one nucleus splits to form two smaller nuclei?**
- **Answer:** b. fission
### Question 16
**If a balloon is taken outside on a very cold day, what will occur?**
- **Answer:** b. The volume of the balloon will decrease.
### Question 17
**Match the description of nuclear decay to the type of nuclear decay.**
- **4. Has a mass of 4, positively charged:** b. Alpha
- **5. A negatively charged electron:** a. Beta
- **6. An energy wave:** c. Gamma
### Question 18
**Which process occurs when two nuclei come together to form one bigger nucleus?**
- **Answer:** a. fusion
### Question 19
**What kind of nuclear reaction does the picture show?**
- **Answer:** a. Nuclear Fusion
### Question 20
**Which factor explains why a cube of sugar will dissolve at a slower rate than granular sugar?**
- **Answer:** a. The cube has a smaller surface area.
### Question 21
**In the element above the mass number is ___ and the atomic number is ___.**
- **Blank 1:** Provide the number from the previous context/question.
- **Blank 2:** Provide the number from the previous context/question.
### Question 22
**Chemical equations must be balanced because**
- **Answer:** c. mass can neither be created nor destroyed.
### Question 23
**Compared to an ordinary chemical reaction, a fission reaction will:**
- **Answer:** b. release a larger amount of energy.
### Question 24
**Match the symbols to the terms they represent.**
- **1. A:** c. Atomic Mass
- **2. Z:** a. Atomic Number
- **3. X:** b. Atomic Symbol
### Question 25
**About what percentage of the technetium-99m will be left in the patient's body 12 hours later?**
- **Answer:** c. 25.0% (two half-lives: 100% -> 50% -> 25%)
### Question 26
**How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?**
- **Answer:** c. three (1/8 = 1/2^3)
Feel free to ask if you need further clarification or information!
### Question 1
**Which of the following substances is most acidic?**
- **Answer:** a. rain water with a pH of 5.5
### Question 2
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** a. 223
- **2. Atomic number of the new atom:** j. 86
- **3. Symbol of the new atom:** c. Ac
- **4. Type of decay demonstrated:** e. Alpha Decay
### Question 3
**List the two resources you reviewed and one thing you learned from each.**
- **Answer:**
1. Nuclear Decay Chart: I learned that radioactive isotopes decay at predictable rates, which can be measured through half-lives.
2. Fission vs. Fusion Presentation: I learned the differences in energy output and processes between fusion and fission, particularly that fusion involves the combining of nuclei.
### Question 4
**Nuclear reactions always involve lots of energy.**
- **Answer:** True
### Question 5
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** c. 99
- **2. Atomic number of the new atom:** b. 97
- **3. Symbol of the new atom:** d. Es
- **4. Type of decay demonstrated:** h. Beta Decay
### Question 6
**Why does the chloride ion have a -1 charge?**
- **Answer:** d. Chlorine atoms gain an electron.
### Question 7
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** g. 247
- **2. Atomic number of the new atom:** f. 96
- **3. Symbol of the new atom:** e. Pu
- **4. Type of decay demonstrated:** a. Alpha Decay
### Question 8
**What kind of nuclear reaction does the picture show?**
- **Answer:** a. Nuclear Fission
### Question 9
**How much of element X remains after 10 days have passed?**
- **Answer:** b. 25 g (since it takes 10 days, which is two half-lives: 100g -> 50g -> 25g)
### Question 10
**Match the part of the diagram to its correct label.**
- **1. W:** c. Proton
- **2. X:** a. Electron
- **3. Y:** b. Neutron
- **4. Z:** d. Nucleus
### Question 11
**Approximately how old is the bone?**
- **Answer:** c. 22,920 years (since it is 1/8, which is 3 half-lives: 5,730 years x 3 = 17,190 years)
### Question 12
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** e. 253
- **2. Atomic number of the new atom:** b. 101
- **3. Symbol of the new atom:** f. Fm
- **4. Type of decay demonstrated:** a. Beta Decay
### Question 13
**Which BEST describes what occurs in a fusion reaction?**
- **Answer:** a. Two low mass nuclei are joined to form one nucleus and gives off energy.
### Question 14
**Given the following nuclear reaction:**
- **1. Atomic mass of the new atom:** d. 220
- **2. Atomic number of the new atom:** e. 88
- **3. Symbol of the new atom:** b. Rn
- **4. Type of decay demonstrated:** f. Alpha Decay
### Question 15
**Which process occurs when one nucleus splits to form two smaller nuclei?**
- **Answer:** b. fission
### Question 16
**If a balloon is taken outside on a very cold day, what will occur?**
- **Answer:** b. The volume of the balloon will decrease.
### Question 17
**Match the description of nuclear decay to the type of nuclear decay.**
- **4. Has a mass of 4, positively charged:** b. Alpha
- **5. A negatively charged electron:** a. Beta
- **6. An energy wave:** c. Gamma
### Question 18
**Which process occurs when two nuclei come together to form one bigger nucleus?**
- **Answer:** a. fusion
### Question 19
**What kind of nuclear reaction does the picture show?**
- **Answer:** a. Nuclear Fusion
### Question 20
**Which factor explains why a cube of sugar will dissolve at a slower rate than granular sugar?**
- **Answer:** a. The cube has a smaller surface area.
### Question 21
**In the element above the mass number is ___ and the atomic number is ___.**
- **Blank 1:** Provide the number from the previous context/question.
- **Blank 2:** Provide the number from the previous context/question.
### Question 22
**Chemical equations must be balanced because**
- **Answer:** c. mass can neither be created nor destroyed.
### Question 23
**Compared to an ordinary chemical reaction, a fission reaction will:**
- **Answer:** b. release a larger amount of energy.
### Question 24
**Match the symbols to the terms they represent.**
- **1. A:** c. Atomic Mass
- **2. Z:** a. Atomic Number
- **3. X:** b. Atomic Symbol
### Question 25
**About what percentage of the technetium-99m will be left in the patient's body 12 hours later?**
- **Answer:** c. 25.0% (two half-lives: 100% -> 50% -> 25%)
### Question 26
**How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?**
- **Answer:** c. three (1/8 = 1/2^3)
Feel free to ask if you need further clarification or information!
Answered by
GPT-4o mini
Based on the information you've provided from the picture in Question 21:
```
9
0
BE
4
```
This appears to describe the element beryllium (Be) in nuclear notation (A/Z-X format).
Here, "4" is the atomic mass (A), "0" is probably meant to be the atomic number (Z), but since 9 and 0 don’t align with common atomic number conventions, let’s clarify:
- **Mass number (A) = 9**
- **Atomic number (Z) = 4** (which corresponds to beryllium)
- **Element symbol = Be**
### Answers for Question 21:
- **Blank 1:** 9
- **Blank 2:** 4
So, based on this context, your final answer should read:
- In the element above, the mass number is **9** and the atomic number is **4**.
```
9
0
BE
4
```
This appears to describe the element beryllium (Be) in nuclear notation (A/Z-X format).
Here, "4" is the atomic mass (A), "0" is probably meant to be the atomic number (Z), but since 9 and 0 don’t align with common atomic number conventions, let’s clarify:
- **Mass number (A) = 9**
- **Atomic number (Z) = 4** (which corresponds to beryllium)
- **Element symbol = Be**
### Answers for Question 21:
- **Blank 1:** 9
- **Blank 2:** 4
So, based on this context, your final answer should read:
- In the element above, the mass number is **9** and the atomic number is **4**.
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