Atomic Structure

Front

What is the charge of an electron?

Back

Negative charge.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

True or False: Protons and neutrons have about the same mass.

Back

True.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

Where are protons located in an atom?

Back

In the nucleus.

Front

Where are electrons located in an atom?

Back

In the electron cloud surrounding the nucleus.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.