複選題68. NF3 has a bond angle of 102.5º, while PF3 has a bond angle of 96.3º. What is the best explanation for the larger bond angle in NF3? (A) The nitrogen 2s orbital participates more in bonding than the phosphorus 3s orbital does. (B) Nitrogen is more electronegative than phosphorus. (C) NF3 has no unpaired electrons while PF3 has two unpaired electrons. (D) NF3 is an ionic compound while PF3 forms covalent bonds. (E) NF3 adopts a trigonal geometry, while PF3 displays a trigonal planar configuration.