Statistics for Elements by interesting properties

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Hint	Answer	% Correct
The most common element in the universe	Hydrogen	100%
The only liquid metal	Mercury	98%
The only element beginning with the letter X, or with an X for its chemical symbol	Xenon	80%
Element with the highest presence in the human body	Oxygen	75%
The only element beginning with the letter V, or with a V for its chemical symbol	Vanadium	68%
The only radioactive gas	Radon	60%
The only liquid non-metal	Bromine	53%
Element with the lowest boiling point	Helium	45%
The metal with the highest melting point	Tungsten	35%
The first element alphabetically by name and chemical symbol	Actinium	30%
Element with the highest melting point	Carbon	30%
The most electronegative element	Fluorine	23%
The densest naturally occurring element	Osmium	23%
The most radioactive element	Polonium	23%
The rarest naturally occurring element in the Earth's crust	Astatine	8%
The element with the highest atomic radii	Caesium	8%