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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neon
methane
chlorine
nitrogen
answers
flagSwitzerland
1%
98%
0%
0%
65
flagFinland
0%
97%
0%
2%
83
flagGreece
0%
95%
4%
0%
41
flagNepal
5%
92%
0%
2%
39
flagthe United Arab Emirates
6%
87%
1%
4%
66
flagPoland
10%
83%
3%
2%
16413
flagthe Netherlands
12%
80%
5%
0%
119
flagAustria
16%
80%
3%
0%
31
flagAustralia
15%
78%
2%
2%
38
flagUnknown
16%
77%
3%
2%
1416
flagthe United States
11%
77%
7%
2%
537
flagthe United Kingdom
13%
76%
7%
1%
507
flagNorway
17%
76%
2%
2%
34
flagGermany
15%
75%
3%
4%
212
flagSweden
15%
75%
6%
3%
64
flagIndia
16%
74%
2%
4%
280
flagPakistan
21%
73%
2%
0%
41
flagItaly
27%
69%
2%
0%
36
flagRepublic of Ireland
22%
66%
6%
4%
48
flagthe Philippines
21%
64%
8%
5%
37