Games
3
20
Easy

What Element has the Atomic Number 21?

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21

Sc

Scandium
60

Zn

Neodymium
61

Pm

Promethium
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Scandium
13
21
Medium

This element is a transition metal used in large amounts by the electrical industry in the form of wire. This metal is the second-best in the electrical conductance. Because this element resists corrosion in air, moisture and seawater, it has been widely used in coins.

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29

Cu

Copper
26

Fe

Iron
80

Hg

Mercury
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Copper
16
20
Hard

This element and its compounds are poisonous and they are used for the production of rat poison and insecticides. It is a metalloid. Small amounts of this element are added to germanium to make transistors.

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33

As

Arsenic
110

I

Darmstadtium
60

Nd

Neodymium
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Arsenic

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