Vocabulary
Vertical columns
What is a Group?
Hydrogen
Helium
He
Hydrogen
1
Valence Electrons ___ from left to right
Increases
Horizontal Rows
What is a Period
Oxygen
Sodium
Na
Carbon
Valence Electrons ___ from top to bottom
Stay the same (Excluding Transition metals)
1st vertical column
Alkali Metals
Neon
10
Iron
Fe
Oxygen
6
Atomic Numbers __ from bottom right to top left
Decrease (Kind of excluding Helium)
17th vertical column
Halogens
Sodium
11
Gold
Au
Bromine
7
(Periodic) Ionisation energy
Increases as you move right
diagonal section after the transition metals
Metaloids
Potassium
Tungsten
W
Helium
2
(Group) Ionisation energy
Decreases the further down in a group