FREE CART Atomic Structure Questions and Answers

Question 1

What is the atomic number of an element?

Accepted Answer

The number of protons in an atom's nucleus

Answer

The number of neutrons in an atom's nucleus

Answer

The number of electrons in an atom's nucleus

Answer

The total number of protons and neutrons in an atom's nucleus

Question 2

Which subatomic particles are located in the nucleus of an atom?

Accepted Answer

Protons and neutrons

Answer

Protons and electrons

Answer

Neutrons and electrons

Answer

Electrons only

Question 3

What is the charge of an electron?

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Answer

Variable

Question 4

Isotopes of an element differ in the number of which subatomic particle?

Accepted Answer

Neutrons

Answer

Protons

Answer

Electrons

Answer

Positrons

Question 5

Which of the following best describes the mass number of an atom?

Accepted Answer

The sum of the protons and neutrons in the nucleus

Answer

The total number of electrons in an atom

Answer

The number of protons in the nucleus

Answer

The average mass of all isotopes of an element