Protons, neutrons, electrons

Front

What atomic particle determines the element?

Back

Protons are the atomic particles that determine the identity of an element.

Front

How many neutrons does beryllium have?

Back

Beryllium has 5 neutrons.

Front

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

Back

To find the number of neutrons, subtract the atomic number from the mass number.

Front

What is the mass of an atom with 2 protons, 2 neutrons, and 2 electrons?

Back

The mass of the atom is 4 (2 protons + 2 neutrons).

Front

How many electrons does helium have?

Back

Helium has 2 electrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.