A student wants to draw a model of an atom. Which statement describes how to find the number of neutrons to include in the model?

Question

(1 point)

Add the atomic number and the mass number.

Subtract the number of electrons from the number of protons.

Subtract the atomic number from the mass number.

Add the number of electrons to the number of protons.

Answer 1

The correct statement to find the number of neutrons to include in the model of an atom is:

Subtract the atomic number from the mass number.

The atomic number represents the number of protons in the atom, and the mass number represents the total number of protons and neutrons. Therefore, the number of neutrons can be calculated with the formula:

Number of neutrons = Mass number - Atomic number.