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Which of the following is not a chemical element?

neon
methane
chlorine
nitrogen
Neon, chlorine and nitrogen are chemical elements. Methane is a chemical compound, the simplest alkane and the main component of natural gas.
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Answers by country

neon
methane
chlorine
nitrogen
answers
flagFrance
0%
92%
0%
7%
14
flagUnknown
13%
82%
0%
3%
51
flagSingapore
13%
82%
0%
4%
23
flagGhana
17%
82%
0%
0%
17
flagthe United Arab Emirates
6%
80%
6%
6%
15
flagPoland
14%
78%
4%
2%
13839
flagNigeria
9%
78%
4%
4%
71
flagAustria
11%
76%
7%
4%
42
flagAustralia
14%
75%
7%
2%
78
flagCanada
13%
75%
2%
8%
36
flagMalaysia
18%
75%
0%
6%
32
flagthe Netherlands
18%
75%
6%
0%
16
flagGermany
13%
74%
5%
6%
213
flagthe United Kingdom
14%
73%
9%
1%
213
flagIndia
17%
72%
4%
4%
563
flagPakistan
20%
72%
1%
3%
62
flagthe United States
17%
70%
5%
4%
481
flagGreece
25%
60%
5%
10%
20
flagthe Philippines
24%
56%
12%
8%
50
flagRepublic of Ireland
45%
45%
4%
4%
22

What is inside Swiss cheese holes?

nitrogen
carbon dioxide
water vapor
air

Are gas fittings tightened clockwise or anti-clockwise?

clockwise
anti-clockwise
it depends on the gas
there is no standard

How many percent of the total mass of the sun is gas?

79,8
89,9
99,8
100

Which of the following is not a chemical element?

iridium
limestone
tungsten
tin