Can the atomic mass of an element vary?
A) No, it is fixed; otherwise a new element will be formed.
B) Yes. Adding or losing electrons will substantially change the atomic mass.
C) Yes. Adding or losing protons will change the atomic mass without forming a different element.
D) Yes. Adding or losing neutrons will change the atomic mass without forming a different element.

Question

Quizplus · Accepted Answer

The atomic mass of an element can vary when neutrons are added or lost. This is because the atomic mass is the sum of the number of protons and neutrons in the nucleus of an atom, and changing the number of neutrons will change the mass without changing the type of element. Adding or losing electrons will change the charge of the atom, but not the atomic mass. Adding or losing protons will change the atomic number, creating a new element with a different atomic mass.

Can the Atomic Mass of an Element Vary