Question

Plz answer this........​

Answer 1

Explanation:

As we know that :-

• Atom having same number of neutron but different mass number are called isotone.

Now,

At first, we need to calculate the number of neutron.

• n = atomic mass - atomic number

Ge = 76 - 32 = 44

Option 1)

Ge = 77 - 32 = 45

Option 2)

As = 77 - 33 = 44

Option 3)

Se = 77 - 34 = 43

Option 4)

Se = 78 - 34 = 44

Here, we see that option (ii) (As) and option (iv) (Se) has same number of neutron and different mass number.

Hence,

Isotone of Ge is As and Se.

Therefore,

Option d) is correct.

Additional information -

Isotope -

• Isotope are atom of same element which have the same atomic number but different mass number.

Isobar -

• Isobar are atoms of different elements having the same mass number but different atomic number.