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

N
O
P
R
N is the chemical symbol of nitrogen, O - oxygen, P - phosphorus.
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Answers by country

N
O
P
R
answers
flagthe Netherlands
0%
0%
7%
92%
14
flagPoland
4%
5%
6%
82%
8325
flagMalaysia
6%
3%
6%
81%
32
flagIndia
2%
6%
8%
80%
568
flagUnknown
4%
2%
11%
80%
42
flagGhana
4%
0%
12%
80%
25
flagthe United Kingdom
2%
7%
9%
78%
182
flagFrance
14%
7%
0%
78%
14
flagthe Philippines
3%
7%
8%
77%
57
flagCanada
5%
2%
13%
77%
36
flagNigeria
1%
5%
13%
76%
75
flagSwitzerland
0%
9%
14%
76%
21
flagthe United States
5%
8%
9%
75%
457
flagGermany
4%
11%
8%
74%
224
flagPakistan
1%
5%
18%
71%
60
flagAustria
6%
15%
6%
71%
32
flagSingapore
9%
12%
9%
69%
33
flagthe United Arab Emirates
11%
16%
0%
66%
18
flagRepublic of Ireland
10%
20%
5%
65%
20
flagAustralia
5%
14%
17%
61%
68