Atomic Number of an Element Is Defined as the Number

Multiple Choice

Atomic number of an element is defined as the number of:

A) electrons in the nucleus of an atom of the element.
B) neutrons in the nucleus of an atom of the element.
C) protons and neutrons in an atom of the element.
D) neutrons and electrons in an atom of element.
E) protons in the nucleus of an atom of the element.