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Most Common and Rare Elements

Can you name the most common and rare elements found in the Earth's crust?
Abundance measured in mg/kg
Quiz by Raffles
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Last updated: February 12, 2022
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First submittedFebruary 12, 2022
Times taken14
Average score45.0%
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Abundance
Element
461000
Oxygen
282000
Silicon
82300
Aluminum
56300
Iron
41500
Calcium
23600
Sodium
23300
Magnesium
20900
Potassium
5650
Titanium
1400
Hydrogen
Abundance
Element
3*10^-20
Astatine
2*10^-19
Promethium
1*10^-18
Francium
4*10^-13
Radon
3*10^-12
Neptunium
3*10^-11
Plutonium
2*10^-10
Polonium
5.5*10^-10
Actinium
3*10^-9
Technetium
9*10^-7
Radium
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