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%
5%
94%
0%
19
flagthe Philippines
0%
7%
92%
0%
14
flagSingapore
0%
0%
90%
10%
10
flagIndia
5%
4%
88%
1%
97
flagCanada
0%
0%
87%
6%
16
flagthe United Kingdom
3%
8%
80%
6%
125
flagthe United States
6%
6%
78%
5%
208
flagUnknown
5%
13%
76%
3%
51
flagNorway
16%
8%
75%
0%
12
flagPoland
8%
13%
73%
4%
2870
flagthe Netherlands
0%
23%
69%
7%
13
flagAustralia
8%
0%
66%
8%
12
flagGermany
13%
15%
45%
25%
44

Gender

men73%
women72%
H
9%
9%
I
13%
12%
J
73%
72%
K
4%
5%

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