H
Hydrogen
He
Helium
Li
Lithium
Be
Beryllium
B
Boron
C
Carbon
N
Nitrogen
O
Oxygen
F
Fluorine
Ne
Neon
Na
Sodium
Mg
Magnesium
Al
Aluminum
Si
Silicon
P
Phosphorus
S
Sulfur
Cl
Chlorine
Ar
Argon
K
Potassium
Ca
Calcium
What is a group?
Column
What is a period?
Row
What do we call group 1 elements?
Alkali metals
Does atomic size increase or decrease moving to the left in a period?
Increase