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.
reach: rather globalchemical elementschemistry
Answers by country
N
O
P
R
answers
the Netherlands
14
Poland
8323
Malaysia
32
India
568
Unknown
42
Ghana
25
the United Kingdom
182
France
14
the Philippines
57
Canada
36
Nigeria
75
Switzerland
21
the United States
455
Germany
221
Pakistan
60
Austria
31
Singapore
33
the United Arab Emirates
18
Republic of Ireland
20
Australia
68