Question

multiple choice 1 point
why are alkali metals (group 1) more reactive as you move down the group?
the atomic radius decreases, making it harder to lose electrons
the outer electrons are more strongly attracted to the nucleus
the nucleus becomes more positively charged
the outer electron is further from the nucleus, making it easier to lose

Explanation:

As you move down Group 1 (alkali metals), the number of electron - shells increases. This leads to an increase in atomic radius. The outermost electron is in a shell that is further from the nucleus. The effective nuclear charge experienced by this outer - electron decreases due to shielding by inner - shell electrons. So, it is easier to lose this outer electron, making the element more reactive.

Answer:

The outer electron is further from the nucleus, making it easier to lose.