Front

What are the subatomic particles?

Back

Protons, Electrons, Neutrons

Front

What is this subatomic particle that has positive charge?

Back

Proton

Front

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

Back

atom

Front

What mass does a neutron have?

Back

1 amu

Front

Complete the missing label on the diagram.

Back

Nucleus

Front

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

Back

Protons and Neutrons

Front

Why is the electron not included in the calculations for the atomic mass?

Back

Its mass is basically zero

Front

An atom has 9 protons, 10 neutrons, and 9 electrons. What is the charge on this atom?

Back

0

Front

An atom has 8 protons, 8 neutrons, and 10 electrons. What is the mass of this atom?

Back

16

Front

Sodium has an atomic number of 11, how many protons does this atom have?

Back

11

Answer explanation

The smaller number is the atomic number and it is the number of protons in the nucleus.