Question

the composition of two atomic particles is given below:
X Y
PROTONS: 8 8
NEUTRONS: 8 9
ELECTRONS: 8 8
[A] What is the mass number of X?
[b] What is the mass number of Y?
[c]what is the relation between x and y
[d] which element/elements do they represents

Answer 1

Atomic mass=number of protons+number of neutrons

Atomic mass of X = 6+6=12

Atomic mass of Y =6+8=14

Both X and Y have same atomic number but different atomic mass number so they are isotopes.

Answer 2

Explanation:

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