Which letter is not used as a symbol of chemical element?

H
I
J
K
H is the chemical symbol of hy­dro­gen, I - iodine, K - potas­si­um.

Answers distribution

H
I
J
K
answers
flagPakistan
0%
0%
100%
0%
14
flagthe Philippines
0%
7%
92%
0%
13
flagIndia
3%
5%
90%
0%
76
flagCanada
0%
0%
87%
6%
16
flagthe United States
5%
4%
83%
5%
173
flagUU
0%
14%
80%
4%
21
flagthe United Kingdom
1%
10%
78%
7%
107
flagPoland
8%
12%
73%
4%
2384
flagAustralia
9%
0%
63%
9%
11
flagGermany
11%
20%
50%
17%
34

Gender

men75%
women70%
H
8%
10%
I
13%
12%
J
75%
70%
K
3%
6%

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answers
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Which letter is not used as a symbol of chemical element?
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