The atomic number is determined by the number of ____ in an atom's nucleus.
A)neutrons and protons
B)neutrons and electrons
C)protons and electrons
D)protons only
E)neutrons only

Question

Quizplus · Accepted Answer

The atomic number refers to the number of protons in an atom's nucleus. This determines the element to which the atom belongs as each element has a unique number of protons. Neutrons can vary among atoms of the same element, and electrons are located in the electron cloud, not the nucleus.

The Atomic Number Is Determined by the Number of ____