Can phosphorus with outer electronic configureation `3s^2 3p^3 " form "PH_5`?

a. Would you except the hydrides of N,O and F to have lower boiling points than the hydrides of their subsequent group members? Give reason. b. Can phosphorous with outer electronic configuration 3s^(2)3p^(3) form PH_(5) ? c. How many hydrogen-bonded water molecules(s) are associated with CuSO_(4).5H_(2)O ?

Phosphorus cannot form PH_(5) with its outer electronic configuration as 3s^(3)3p^(3) because

The symbol of the element whose atoms have the outer most electronic configuration 2s^(2) 2p^(3) is

The outer electronic structure of 3s^2 3p^5 is possessed by

The electronic configuration 1s^(2) 2s^(2) 2p^(5) 3s^(1) shows