Atomic mass is the decimal number that is on the periodic table...
Boron's atomic mass is 10.81
Answer:
Highest energy will be equal to 
Explanation:
Charged on doubly ionized helium atom 
It is accelerated with maximum voltage of 3 MV
So voltage 
Now energy is given by 
So highest energy will be equal to 
Well theres 5 so times 2 equals 10
A chemical reaction happens when the atoms or molecules rearrange to form a new substance