Atomic structure

Front

Subatomic particles that are neutral in charge

Back

Neutrons

Front

How many neutrons does calcium have?

Back

20

Front

Value representing the number of protons in an element

Back

Atomic Number

Front

What number indicates an electron?

Back

3

Front

Subatomic particles with a negative charge

Back

Electrons

Front

The center of an atom, containing protons and neutrons

Back

Nucleus

Front

Subatomic particles with a positive charge

Back

Protons

Front

The total number of protons and neutrons in an atom

Back

Mass Number

Front

The number of electrons in the outermost shell of an atom

Back

Valence Electrons

Front

The smallest unit of an element that retains its properties

Back

Atom