1. Periodic – means repeating or refers to a pattern
- A period (or row – left to right) on the periodic table increases in atomic number
Group or family –
elements in the same group (column – up and down) will react with other elements in similar ways

2. What group are the following elements in?
Sulfur
Iodine Ca Fe
What period are the following elements in?

3. Identify an element in the same family as
Nitrogen
Sulfur
Krypton
Identify an element in the same period as
Potassium
Argon
Lithium

4. Identify the following element:
This metal is very reactive, has properties similar to magnesium, and is in the same period as bromine.
This nonmetal is in the same group as lead
This metal is the most reactive metal in its period and cannot be found uncombined in nature. Each atom of the element contains 19 protons.