How do alkali metals differ from alkaline earth metals

Alkali metals and alkaline-earth metals are similar, but they are different in some ways as well. Alkaline-earth metals are slightly less reactive that alkali metals and more dense. Alkali metals have a very low density so they can be cut fairly easily. Both of these metals have a silver color.

1. they vary with a higher number because boiling is way hotter than melting

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.