(1)B
(2)①C+4HNO 3=CO 2↑+4NO 2↑+2H 2O;②2Na 2O 2+2CO 2=2Na 2CO 3+O 2
(3)PCl 3或CCl 4;1s 22s 22p 63s 23p 63d 54s 1或[Ar]3d 64s 1
(4)sp 3;sp 2;7;1
(5)氮;ce
(1)B
(2)①C+4HNO 3=CO 2↑+4NO 2↑+2H 2O;②2Na 2O 2+2CO 2=2Na 2CO 3+O 2
(3)PCl 3或CCl 4;1s 22s 22p 63s 23p 63d 54s 1或[Ar]3d 64s 1
(4)sp 3;sp 2;7;1
(5)氮;ce