What happens to the reactivity of the alkali metals as you move down the group?

Which alkali metal is the least reactive?

In our class practical, which of the following was the most reactive in water?

As you move down the group, the reactivity of alkali metals:

Lithium, sodium, potassium- which alkali metal sets alight when in contact with water?

When you drop potassium to a bowl of water the colour of the universal indicator changes from

All alkali metals can be easily cut with a scalpel

How many electrons do alkali metals have on the outer shell?

The larger the atom, the more reactive it is.

Which alkali metal loses its outer electron most easily?

Which alkali metal requires the most energy to remove its outer electron from its shell?