Alkyl halids are more reactive compounds then others?

I think so... but i would check the Periodic table to make sure if i were you

Yes

'More reactive'.

Alkali metals are more reactive as they are in group 1 and therefore has only one valence electron. With only one valence electron, its easy for them to achieve inert configuration/ noble gas...

the reason some metals are most reactive than other is that the metal elements with tightly bound electrons are less reactive than those with loosely bound electrons. =)