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