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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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Answers by country

copper
iron
brass
chromium
answers
flagGhana
0%
3%
93%
3%
31
flagSingapore
2%
0%
89%
5%
38
flagthe Netherlands
0%
0%
88%
5%
17
flagUnknown
2%
4%
87%
6%
47
flagRepublic of Ireland
4%
0%
87%
8%
24
flagthe United Arab Emirates
0%
4%
86%
4%
23
flagPoland
3%
4%
84%
6%
14061
flagAustralia
1%
2%
84%
12%
88
flagMalaysia
0%
2%
83%
4%
42
flagthe United Kingdom
3%
2%
81%
10%
315
flagCanada
1%
7%
81%
7%
66
flagIndia
1%
6%
80%
9%
852
flagNigeria
1%
7%
79%
7%
113
flagGermany
2%
5%
78%
11%
540
flagthe Philippines
1%
6%
78%
9%
75
flagthe United States
4%
4%
77%
12%
599
flagPakistan
4%
7%
76%
9%
103
flagAustria
8%
3%
72%
15%
84
flagSaudi Arabia
10%
10%
70%
5%
20
flagSwitzerland
6%
9%
67%
9%
43

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

What is gluten?

a type of sugar
a mixture of proteins
an alkaloid
a type of fat