Which of the following is not a chemical element?

copper
iron
brass
chromium
Copper, iron and chromium are chemical elements. Brass is a metal alloy made of copper and zinc.
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copper
iron
brass
chromium
answers
flagFinland
0%
0%
100%
0%
43
flagSwitzerland
0%
0%
100%
0%
36
flagGreece
0%
0%
96%
3%
30
flagthe United Arab Emirates
2%
2%
93%
2%
45
flagFrance
0%
4%
92%
4%
25
flagPoland
2%
3%
87%
5%
13522
flagthe Philippines
3%
3%
87%
3%
33
flagUnknown
3%
3%
86%
6%
1112
flagItaly
0%
5%
86%
8%
36
flagIndia
1%
6%
83%
7%
297
flagAustria
2%
2%
83%
11%
36
flagthe United Kingdom
5%
4%
82%
7%
435
flagthe Netherlands
0%
9%
82%
6%
87
flagAustralia
0%
0%
81%
18%
33
flagthe United States
3%
4%
80%
10%
462
flagSweden
8%
2%
80%
8%
36
flagPakistan
4%
6%
79%
10%
48
flagCanada
2%
7%
79%
7%
39
flagGermany
6%
7%
76%
8%
156
flagRepublic of Ireland
11%
2%
73%
11%
34