A:pick up; give u
B:put away; give u
C:give up; put away
D:give up; pick u
某些化学键的键能(kJ/mol)如下表所示:
键
H—H
Br—Br
I—I
Cl—Cl
H—Cl
H—I
H—Br
键能
436.0
193.7
152.7
242.7
431.8
298.7
366