Question

What are isotopes in simple language? What are the important isotopes of uranium?

Answer 1

Isotopes are the atoms of same element (same atomic number) with different mass no.
e.g.
Hydrogen have three isotopes
₁H¹, ₁H², ₁H³
Number of protons 1 1 1
(atomic number)

Mass number 1 2 3
(Number of Proton + neutron)

Number of neutron 0 1 2

So isotopes differ in number of neutron.

Uranium (₉₂U) have three naturally occurring isotopes, these are ₉₂U²³⁸, ₉₂U²³⁵, ₉₂U²³⁴ . all these isotopes are radioactive.