Question

3(d) Isotopes are
Atoms of an element with similar chemical properties but
different atomic masses.
Atoms of different elements with similar chemical properties
but different atomic masses.
(ii)
Atoms of an element with different chemical properties but
same atomic masses.
(iv)
Atoms of different elements with different chemical
properties but same atomic masses.​

Answer 1

Answer:

atoms of element with different chemical properties but same atomicmasses

Answer 2

Answer:

Isotopes are atoms of an element with similar chemical properties and different atomic masses and different physical properties. So 1st option is correct