atoms and molecules

The subatomic particle with a positive charge is the:

• proton

• neutron

• electron

• nucleus

The subatomic particle with no charge is the:

• electron

• quark

• proton

• neutron

The subatomic particle with a negative charge is the:

• electron

• proton

• photon

• neutron

Protons and neutrons are found in the ___ of an atom.

Electrons are found ______ of an atom.

• orbiting around the nucleus

• in the center

• in the nucleus

The atomic number of an element is the number of its

• proton

• neutron

• electron

• proton and neutron

The mass number of an atom is...

• the number of protons minus the number of neutrons

• the number of protons and electrons added together

• the number of protons and neutrons added together

• the number of neutrons minus the electrons

What is the mass number of the element oxygen?

• 8

• 16

• 24

• 4

How many protons are in this oxygen atom?

• 16

• 8

• 4

• 24

How many neutrons does lithium have?

• 3

• 4

• 7

• 10