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