Define Group 1 - The alkali metals.

Group 1 - The alkali metals:

They are too reactive. sodium, and the other alkali metals, are unusual metals.

They have low melting points and are very soft.

For metals, they also have very low densities.

Compounds formed by Group 1 metals are usually white solids

(that dissolve in water to form colorless solutions).

Q: Why potassium float on water?

Ans: Due to low density.

Q: What patterns can you see going down the group?

Ans: Atomic number increase while melting and boiling point decrees down the group.

The alkali metals get more reactive going down the group.