Parts of the Atom (Notes 1/5)

In the nucleus

In the electron cloud

Evenly distributed throughout the atom

In the empty space

Electron

Proton

Neutron

Both proton and neutron

Positive

Negative

Neutral

It depends on the number of neutrons

Protons have a positive charge.

Neutrons are electrically neutral.

Electrons have a negative charge.

Protons have a negative charge.

3

7

6

12

Because atomic weight is the sum of protons and electrons.

Because elements can have isotopes with different numbers of neutrons.

Because atomic weight is the same as atomic number.

Because elements can lose or gain electrons.

They have the same number of protons.

They have different numbers of neutrons.

They have different atomic numbers.

They have the same chemical properties.

The number of valence electrons

The number of protons

The number of neutrons

The atomic mass

Valence electrons are found in the outermost shell.

A full shell makes an atom stable.

Shell 2 can hold up to 8 electrons.

All electrons in an atom are valence electrons.

Atoms are made up of matter.

Matter is composed of atoms.

Atoms and matter are unrelated.

Matter is smaller than atoms.