When the number of neutrons in the nucleus of an atom changes, the mass of the element is different, forming a(n) ____ of the original element.
A) isotope
B) isomere
C) neutral form
D) new form

Question

Quizplus · Accepted Answer

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.

When the Number of Neutrons in the Nucleus of an Atom