The Atom

Front

A particle that moves around the nucleus of an atom is an _______.

Back

Electron

Front

If an atom's atomic number is 2 and has a mass of 4, how many neutrons does the atom have?

Back

2

Front

The positive particles of an atom are called _____.

Back

Protons

Front

The atomic number is always the number of ...

Back

Protons

Front

How many Protons are in one atom of Lithium?

Back

3

Front

What is the center of an atom called?

Back

Nucleus

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons

Front

What charge do neutrons have?

Back

No charge (neutral)

Front

What is the mass of a proton compared to an electron?

Back

Proton is much heavier than an electron.

Front

What determines the identity of an element?

Back

The number of protons in its nucleus.