Atoms

Nucleus

Electron

Proton

Molecule

Proton; Carbon has 6 protons

Neutron; Carbon has 6 neutrons

Electron; Carbon has 6 electrons

Proton; Carbon has 12 protons

Protons have a positive charge and are found in the nucleus.

Neutrons have a negative charge and are found outside the nucleus.

Electrons have a positive charge and are found in the nucleus.

Protons have no charge and are found outside the nucleus.

Electrons are found outside the nucleus.

Protons are located in the nucleus.

Neutrons are located in the nucleus.

Electrons have a positive charge.

Helium

Neon

Argon

Oxygen

2, 8, 8

2, 8, 18

2, 6, 8

2, 8, 10

Atomic number is the sum of protons and neutrons.

Atomic mass is always a whole number.

Atomic number identifies the element.

Atomic mass is the number of electrons.

Protons = Neutrons = Electrons

Protons = Electrons, Neutrons = Atomic Mass - Atomic Number

Protons = Atomic Mass, Electrons = Atomic Number

Neutrons = Electrons, Protons = Atomic Mass

There are more electrons than protons

There are fewer electrons than protons

There are equal numbers of electrons and protons

There are no electrons in a cation

Oxygen (Z=8)

Sodium (Z=11)

Chlorine (Z=17)

Aluminum (Z=13)

Nucleus and electrons

Protons and neutrons

Electrons and protons

Shells and ions

1st shell: 2, 2nd shell: 8, 3rd shell: 8

1st shell: 2, 2nd shell: 8, 3rd shell: 18

1st shell: 2, 2nd shell: 6, 3rd shell: 10

1st shell: 2, 2nd shell: 4, 3rd shell: 8