Question

When the elements in group 1 are considered in order from top to bottom, each successive element at standard pressure has 1 A higher melting point and a higher boiling point 2 a higher melting point and a lower boiling point 3 a lower melting point and a higher boiling point 4 a lower melting point and boiling point

Answer 1

You can deduce this from the fact that the bonding between the atoms in the solid states gets weaker an weaker as you go down the column.