Question

Atoms of the same element that have different masses are called

Answer 1

ISOTOPES

Step-by-step explanation:

As we know that the atoms of same element with different number of protons is known as ISOTOPES

So here we can say that

`_z^(A_1)X , _z^(A_2)X`

here in above example the two atoms are same with same atomic number z

but the mass number is different in it

As we know that

mass number = number of proton + number of neutrons

So isotopes must have different number of neutrons present in the nuclei