Atoms and Atom Model

atomic number after the element name

mass number after the element name

atomic number before the element name

mass number before the element name

2, 1, 8

8, 1, 2

1, 2, 8

2, 8, 1

cation

anion

positron

negatron

atoms

ions

molecules

allotropes

solids

bundle of light

bundle of energy

gases

2

4

6

8

O²

O₂

O

Ox

photons

neutrons

electrons

positrons

2

2-Jan

4-Jan

1/1890

chlorine sodium

sodium chloride

sodium ion

chloride ion