Statistics for Superlatives of Chemical Elements

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Hint	Answer	% Correct
Lightest (Atomic mass)	Hydrogen	86%
Highest abundance in atmosphere	Nitrogen	61%
Highest abundance in the universe	Hydrogen	60%
Highest abundance in earth's ocean	Oxygen	53%
Highest abundance in human body	Oxygen	53%
Highest abundance on earth	Oxygen	52%
Lowest density	Hydrogen	48%
Most electronegative	Fluorine	36%
Heaviest atomic mass (natural-occuring)	Plutonium	33%
Lowest melting point	Helium	27%
Highest abundance in earth crust	Iron	26%
Lowest boiling point	Helium	21%
Most electropositive	Francium	20%
Rarest abundance on earth (Natural-occuring & Radioactive)	Astatine	16%
Highest density (synthetic)	Osmium	16%
Highest melting point	Carbon	11%
Rarest abundance on earth (Natural-occuring & Stable)	Bismuth	9%
Heaviest atomic mass (synthetic)	Ununseptium	5%
Highest density (natural-occuring)	Hassium	4%
Highest specific heat capacity	Hydrogen	4%
Highest boiling point	Rhenium	4%
Lowest specific heat capacity	Radon/Radium	2%