Atomic Structure

Front

What subatomic particles are found outside the nucleus of an atom?

Back

Electrons.

Front

What is the mass number of helium (He)?

Back

4.

Front

Which subatomic particles have a negative charge?

Back

Electrons.

Front

How many protons are in a helium (He) atom?

Back

2.

Front

What does the atomic number '4' in beryllium (Be) represent?

Back

Number of protons in a Be atom.

Front

What are protons?

Back

Subatomic particles with a positive charge found in the nucleus of an atom.

Front

What are neutrons?

Back

Subatomic particles with no charge found in the nucleus of an atom.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the relationship between mass number and atomic number?

Back

Mass number is the sum of protons and neutrons, while atomic number is the number of protons.