問題一覧
1
H
1
2
He
2
3
Li
3
4
Be
4
5
B
5
6
C
6
7
N
7
8
O
8
9
F
9
10
Ne
10
11
Na
11
12
Mg
12
13
Al
13
14
Si
14
15
P
15
16
S
16
17
Cl
17
18
Ar
18
19
K
19
20
Ca
20
21
Sc
21
22
Ti
22
23
V
23
24
Cr
24
25
Mn
25
26
Fe
26
27
Co
27
28
Ni
28
29
Cu
29
30
Zn
30
31
Ga
31
32
Ge
32
33
As
33
34
Se
34
35
Br
35
36
Kr
36