It has a negative charge emits energy when it moves to a lower energy orbit from an excited state and it has the same mass as a proton
When an atom combines chemically with another atom, it either gains, loses, or shares ELECTRONS.
If you have a book, read it!! I promise you, it tells you this answer!
<u>Answer: </u>The amount of heat released is 84 calories.
<u>Explanation:
</u>
The equation used to calculate the amount of heat released or absorbed, we use the equation:

where,
Q = heat gained or released = ? Cal
m = mass of the substance = 10g
c = specific heat of aluminium = 0.21 Cal/g ° C
Putting values in above equation, we get:
Q = -84 Calories
Hence, the amount of heat released is 84 calories.
The answer is letter (B).