Protons, Neutrons, & Electrons

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom. They determine the atomic number and identity of an element.

Front

What are neutrons?

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom. They contribute to the atomic mass and stability of the nucleus.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom. They are involved in chemical bonding and reactions.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral (it has no charge).

Front

What is the charge of an electron?

Back

Negative.

Front

How many protons does helium have?

Back

Helium has 2 protons.

Front

How many electrons does helium have?

Back

Helium has 2 electrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

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

Back

Subtract the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number).