The atomic number is the number of
A) atoms in a molecule
B) protons in an atom
C) nuclei in a molecule
D) electrons in an atom
E) protons and neutrons in an atom

Question

Quizplus · Accepted Answer

The atomic number of an atom is equal to the number of protons it has in its nucleus. This is a unique identifier for every element on the periodic table, as no two elements have the same number of protons in their atoms.

The Atomic Number Is the Number of