1. The Groups of the Periodic table of elements
What is the relationship between the group number and chemical properties of the elements?

2. Most reactive metals in the periodic table
Group 1 – Alkali Metals
Most reactive metals in the periodic table
Shiny, and soft like butter but still solids
Low densities and melting points

3. Group 2 – Alkaline Earth Metals
Not quite as reactive as group 1
Two valence electrons
Harder and denser than Alkali metals
React with water

4. Groups 3-12 – Transition metals
Most of These metals are hard, shiny solids
Mercury is a liquid
Less reactive than groups 1 and 2

5. Carbon is important in the chemistry of life
Group 14 – Carbon Family
Carbon is important in the chemistry of life
Organic compounds contain carbon
Most fuels contain carbon

6. Group 15 – Nitrogen Family
Nitrogen makes up 78% of the atmosphere
Nitrogen is a diatomic molecule
Nitrogen fixation from atmosphere is crucial for plants to grow

7. Oxygen is also diatomic
Group 16 – Oxygen Family
Oxygen is also diatomic
Oxygen is reactive and can combine with almost every other element
Sulfur is a brittle yellow solid

8. Halogen means “salt forming” Most reactive non-metals
Group 17 – The halogens
Halogen means “salt forming”
Most reactive non-metals
When a halogen bonds with an alkali metal it is called a “salt”

9. Do not form compounds because they do not normally react
Group 18 – Noble Gasses
Do not form compounds because they do not normally react
Also called inert gasses
Have 8 valence electrons

10. Chemical properties are very different from all other elements
hydrogen
Chemical properties are very different from all other elements
Makes up over 90% of all of the atoms in the universe
Hydrogen fusion defines a star