1.Melting / Boiling Point Of Group 1 elements

Decreases down the group

Order (MP/BP):
Li > Na > K > Rb > Cs

Bigger atoms = weaker metallic bond = lower MP/BP”

2. Be >Ca > Sr > Ba> Mg (irregular pattern M.P)

Be >Ba >Ca> Sr>Mg ( B.P)

Melting point (MP) and boiling point (BP) of Group 2 elements are higher than the corresponding Group 1 element