✔ 最佳答案
Phosphorus ge electronic configuration係2,8,5,有三個shell
nitrogen ge electronic configuration係2,5,得兩個shell
如是者,兩者就出現screening effect上ge分別...
因為P有多一層shell ge緣故,於是screening effect比較強,
atomic size 就大過nitrogen啦...
Nitrogen molecule 係N2 因為period 2 ge element size比較細,screening effect比較弱,form multiple bonds 都唔會產生太大ge repulsion,於是nitrongen atom tends to form N2 molecules (TRIPLE BOND)
P form唔到P2,因為佢地多層shell,screening effect on the outermost electron大左,如果產生multiple bonds 將會非常唔穩定,所以佢選擇左form 3個single bond,出現tetraheral shape.