Question
Question 19
One molecule of Iodine (I2) and two molecules of sodium chloride (NaCl) combine in a reaction. How many atoms are in the products?
a
2
b
4
c
6
d
3
Question 20
Which event is an example of an exothermic reaction?
a
melting ice
b
evaporation
c
combustion
d
decomposition
Question 21
9 0
Be
4
In the element above the mass number is and the atomic number is .
Blank 1:
Blank 2:
Question 22
Which process occurs when two nuclei come together to form one bigger nucleus?
a
fusion
b
fission
c
both
d
neither
Question 23
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 Mass
c.Atomic Symbol
One molecule of Iodine (I2) and two molecules of sodium chloride (NaCl) combine in a reaction. How many atoms are in the products?
a
2
b
4
c
6
d
3
Question 20
Which event is an example of an exothermic reaction?
a
melting ice
b
evaporation
c
combustion
d
decomposition
Question 21
9 0
Be
4
In the element above the mass number is and the atomic number is .
Blank 1:
Blank 2:
Question 22
Which process occurs when two nuclei come together to form one bigger nucleus?
a
fusion
b
fission
c
both
d
neither
Question 23
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 Mass
c.Atomic Symbol
Answers
GPT-4o mini
Here are the answers to your questions:
**Question 19:**
When one molecule of Iodine (I₂) and two molecules of Sodium Chloride (NaCl) combine, we break it down as follows:
- I₂ has 2 iodine atoms.
- Each NaCl molecule has 1 sodium atom and 1 chlorine atom, so 2 NaCl will have 2 sodium atoms and 2 chlorine atoms.
Calculating the total:
- 2 iodine atoms (from I₂)
- 2 sodium atoms (from 2 NaCl)
- 2 chlorine atoms (from 2 NaCl)
Total = 2 (I) + 2 (Na) + 2 (Cl) = 6 atoms.
**Answer:** c) 6
---
**Question 20:**
An exothermic reaction is one that releases heat. Among the options provided:
- Melting ice is an endothermic process (absorbs heat).
- Evaporation is also endothermic (absorbs heat).
- Combustion is a reaction that releases heat and is a classic example of an exothermic reaction.
- Decomposition can be endothermic or exothermic depending on the specific reaction but is often considered endothermic.
**Answer:** c) combustion
---
**Question 21:**
For the element Beryllium (Be) shown in the format you’ve mentioned:
- The mass number (A) is the total number of protons and neutrons. In this case, it is 9.
- The atomic number (Z) is the number of protons in the nucleus, here it is 4.
**Answer:**
Blank 1: 9
Blank 2: 4
---
**Question 22:**
The process of two nuclei coming together to form one bigger nucleus is known as fusion.
**Answer:** a) fusion
---
**Question 23:**
Matching the symbols to their respective terms:
1. A: b. Atomic Mass
2. Z: a. Atomic Number
3. X: c. Atomic Symbol
In proper format:
1. A: b
2. Z: a
3. X: c
**Question 19:**
When one molecule of Iodine (I₂) and two molecules of Sodium Chloride (NaCl) combine, we break it down as follows:
- I₂ has 2 iodine atoms.
- Each NaCl molecule has 1 sodium atom and 1 chlorine atom, so 2 NaCl will have 2 sodium atoms and 2 chlorine atoms.
Calculating the total:
- 2 iodine atoms (from I₂)
- 2 sodium atoms (from 2 NaCl)
- 2 chlorine atoms (from 2 NaCl)
Total = 2 (I) + 2 (Na) + 2 (Cl) = 6 atoms.
**Answer:** c) 6
---
**Question 20:**
An exothermic reaction is one that releases heat. Among the options provided:
- Melting ice is an endothermic process (absorbs heat).
- Evaporation is also endothermic (absorbs heat).
- Combustion is a reaction that releases heat and is a classic example of an exothermic reaction.
- Decomposition can be endothermic or exothermic depending on the specific reaction but is often considered endothermic.
**Answer:** c) combustion
---
**Question 21:**
For the element Beryllium (Be) shown in the format you’ve mentioned:
- The mass number (A) is the total number of protons and neutrons. In this case, it is 9.
- The atomic number (Z) is the number of protons in the nucleus, here it is 4.
**Answer:**
Blank 1: 9
Blank 2: 4
---
**Question 22:**
The process of two nuclei coming together to form one bigger nucleus is known as fusion.
**Answer:** a) fusion
---
**Question 23:**
Matching the symbols to their respective terms:
1. A: b. Atomic Mass
2. Z: a. Atomic Number
3. X: c. Atomic Symbol
In proper format:
1. A: b
2. Z: a
3. X: c