题型：单选题 题类：常考题 难易度：普通
|
IA |
0 |
||||||||
|
1 |
1 H 氢 1.008 |
2 He 氦 4.003 |
|||||||
|
IIA |
IIIA |
IVA |
VA |
VIA |
VIIA |
||||
|
2 |
3 Li 锂 6.941 |
4 Be 铍 9.012 |
5 B 硼 10.81 |
6 C 碳 12.01 |
7 N 氮 14.01 |
8 O 氧 16.00 |
9 F 氟 19.00 |
10 Ne 氖 20.18 |
|
|
3 |
11 Na 钠 22.99 |
12 Mg 镁 24.31 |
13 Al 铝 26.98 |
14 Si 硅 28.09 |
15 P 磷 30.97 |
16 S 硫 32.06 |
17 Cl 氯 35.45 |
18 Ar 氩 39.95 |
|
试题篮
