What is the isotope of atom?

Answer 1

An isotope atom of an element is one with the same number of protons in the nucleus (i.e the atomic number) but with a different number of neutrons giving it a different mass.

Isotopes have the same chemistry because they have identical valence shells.

An example is chlorine which is found in nature with two stable isotopes 35Cl with 18 neutrons and 37Cl with twenty. As 35 is around 75% and 37 25% in nature the atomic weight is 35.453.

Answer 2

An isotope is a type of atom that has a different number of neutrons than usual. Most Hydrogen atoms have no neutrons, but some have 1. This is an example of an isotope of hydrogen (deuterium, in this case.)

Answer 3

Isotopes are atoms with the same number of protons in the nucleus, but a different number of neutrons in the nucleus. The number of electrons remain unchanged as well. This means that adding a neutron makes the atom heavier.

Answer 4

While all isotopes of a given element share the same number of protons, each isotope differs from the others in its number of neutrons.

Answer 5

An isotope of an element has the same number of protons and electrons, but differs only in the number of neutrons (and thus differs in Atomic Mass).