Question

the composition of nuclei of two atomic species A and B given below.
A B
proton 17 17

neutron 18 20
1 what is the atomic number of A.
2 What is the mass number of B.
3 What is the relation between A and B.
4 What is the electronic configuration of A.​

Answer 1

Answer:

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

Answer:

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