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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%
6%
93%
15
flagPoland
4%
5%
6%
82%
8411
flagMalaysia
6%
3%
6%
81%
32
flagIndia
2%
6%
8%
80%
570
flagUnknown
4%
2%
11%
80%
42
flagGhana
4%
0%
12%
80%
25
flagthe United Kingdom
2%
6%
9%
79%
192
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%
8%
75%
470
flagGermany
5%
11%
8%
73%
235
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

What is the name of the most radioactive isotope on the planet?

Rad 226
Uranus 235
Polonium 210
plutonium 244

Which chemical element forms compounds which are typically intensely colored?

zinc
lithium
chromium
vanadium

Which of the following is not a chemical element?

jupiterium
uranium
neptunium
plutonium

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

T
U
V
W