問題一覧
1
H number
1
2
He number
2
3
Li number
3
4
Be number
4
5
B number
5
6
C number
6
7
N number
7
8
O number
8
9
F number
9
10
Ne number
10
11
Na number
11
12
Mg number
12
13
Al number
13
14
Si number
14
15
P number
15
16
S number
16
17
Cl number
17
18
Ar number
18
19
K number
19
20
Ca number
20