# In the alkali metals group, what happens as the atomic number increases?

Jan 3, 2017

The metal becomes more reducing........

#### Explanation:

The metal becomes more reducing........and MUCH MORE reactive.

Lithium is fairly zippy in water; sodium is even zippier. Potassium will give you bangs and pops and flames.

The metal also reduces its melting point. Potassium has a lower melting point of $63.3$ ""^@C than sodium, $97.8$ ""^@C, and lithium has a melting point of $180.5$ ""^@C.

AS the atomic number increases, the valence electron becomes farther removed from, and less strongly attracted to the nuclear core; and as a result the reactivity of the metal increases.