Which of the following is not a chemical element?

indium
europium
australium
americum
Indium, europium and americum are chemical elements. There is no such thing like an australium.
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indium
europium
australium
americum
answers
flagDenmark
6%
6%
80%
6%
15
flagAustralia
0%
9%
77%
12%
31
flagUkraine
17%
0%
76%
5%
17
flagSingapore
0%
13%
72%
13%
22
flagPoland
13%
10%
64%
10%
7826
flagMalaysia
14%
14%
64%
7%
14
flagthe Philippines
12%
15%
63%
6%
33
flagNorway
13%
13%
63%
9%
22
flagthe United States
9%
12%
62%
15%
344
flagGermany
14%
10%
62%
12%
70
flagthe Netherlands
10%
17%
62%
10%
29
flagthe United Kingdom
13%
11%
60%
13%
219
flagIndia
10%
10%
59%
18%
246
flagRepublic of Ireland
25%
18%
56%
0%
16
flagFrance
17%
21%
53%
7%
28
flagUnknown
20%
12%
52%
14%
668
flagPakistan
19%
14%
50%
16%
42
flagCanada
10%
25%
35%
25%
28
flagNigeria
21%
21%
35%
14%
14
flagthe United Arab Emirates
14%
21%
28%
35%
14