問題一覧
1
Hydrogen
H
2
Helium
He
3
Lithium
Li
4
Beryllium
Be
5
Boron
B
6
Carbon
C
7
Nitrogen
N
8
Oxygen
O
9
Fluorine
F
10
Neon
Ne
11
Sodium
Na
12
Magnesium
Mg
13
Aluminum
Al
14
Silicon
Si
15
Phosphorus
P
16
Sulfur
S
17
Chlorine
Cl
18
Argon
Ar
19
Potassium
K
20
Calcium
Ca
21
Titanium
Ti
22
Chromium
Cr
23
Manganese
Mn
24
Iron
Fe
25
Cobalt
Co
26
Nickel
Ni
27
Copper
Cu
28
Zinc
Zn
29
Gallium
Ga
30
Arsenic
As
31
Bromine
Br
32
Krypton
Kr
33
Silver
Ag
34
Cadmium
Cd
35
Tin
Sn
36
Iodine
I
37
Xenon
Xe
38
Barium
Ba
39
Platinum
Pt
40
Gold
Au
41
Mercury
Hg
42
Lead
Pb
43
Radon
Rn
44
Radium
Ra
45
Hassium
Hs
46
Thulium
Tm
47
Lutetium
Lu
48
Uranium
U
49
Plutonium
Pu