M4 Periodic Table: Group 1 & 2 Metals

M4 The Periodic Table: Group 1 & 2 metals

Slide 20 of 42

Similarity & Trend

Reactivity INCREASES as we move down the group.

1. ALL alkali metals react with water to form their hydroxide and hydrogen gas:

2Li(s) + 2H2O(l) ® 2LiOH(aq) + H2(g)

2Na(s) + 2H2O(l) ® 2NaOH(aq) + H2(g)

2K(s) + 2H2O(l) ® 2KOH(aq) + H2(g)

In general:

2M(s) + 2H2O(l) ® 2MOH(aq) + H2(g)

Where M = group 1 metal.

–Notice the formula of the hydroxide is similar.