Front

What is the atomic number?

Back

The number of protons in the nucleus.

Front

What subatomic particles would you find in the nucleus of an atom?

Back

Protons and Neutrons.

Front

Which subatomic particles contribute the most to the mass of an atom?

Back

Protons and Neutrons.

Front

An atom has 10 protons, 15 neutrons and 10 electrons. What is its mass number?

Back

25.

Front

What is the mass number?

Back

The number of protons and neutrons in the nucleus.

Front

What are protons?

Back

Positively charged subatomic particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral subatomic particles found in the nucleus of an atom.

Front

What are electrons?

Back

Negatively charged subatomic particles that orbit the nucleus of an atom.

Front

How do you calculate the mass number of an atom?

Back

Add the number of protons and neutrons.

Front

What is the charge of a proton?

Back

Positive.