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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

3 answers

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!

picture for Question 21
9 0
BE
4

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.