Most common element

Most common element
Who
Hydrogen
What
90 percentage
Where
The Universe,
When
01 January 0001
Commonest element
Hydrogen is the commonest element in both the Universe (over 90%) and the Solar System (70.68%). Iron is the commonest element in the earth, accounting for 36% of the mass, whilst molecular nitrogen (N2) is the commonest in the atmosphere at 78.08% by volume or 75.52% by mass.