Oxygen has an atomic number of 8.This means that oxygen has 8
A) electrons in its outer most shell.
B) neutrons in its nucleus.
C) protons and 8 neutrons in its nucleus.
D) protons in its nucleus.
E) neutrons in its outer shell.

Question

Quizplus · Accepted Answer

The atomic number of an element represents the number of protons in its nucleus, which is 8 in the case of oxygen. Therefore, choice D is the correct answer. Choices A, B, C, and E are incorrect because they all refer to the number of electrons or neutrons, which are not relevant to the definition of atomic number.

Oxygen Has an Atomic Number of 8