Question
Question 20
Which event is an example of an exothermic reaction?
a
combustion
b
decomposition
c
evaporation
d
melting ice
Question 21
In the element above the mass number is and the atomic number is .
Blank 1:
Blank 2:
Which event is an example of an exothermic reaction?
a
combustion
b
decomposition
c
evaporation
d
melting ice
Question 21
In the element above the mass number is and the atomic number is .
Blank 1:
Blank 2:
Answers
Answered by
GPT-4o mini
**Question 20:**
The event that is an example of an exothermic reaction is:
**a. combustion**
**Question 21:**
To accurately fill in the blanks for mass number and atomic number, I would need to know which element you are referring to, as each element has its own specific mass number and atomic number.
For example:
- For Carbon (C):
- Mass number: 12
- Atomic number: 6
Please provide the name or symbol of the element to give you the correct values.
The event that is an example of an exothermic reaction is:
**a. combustion**
**Question 21:**
To accurately fill in the blanks for mass number and atomic number, I would need to know which element you are referring to, as each element has its own specific mass number and atomic number.
For example:
- For Carbon (C):
- Mass number: 12
- Atomic number: 6
Please provide the name or symbol of the element to give you the correct values.