Nitrogen is the most abundant element in Earth's atmosphere forming approximately 78 % of the total volume.
calcium is!
The second most abundant element in the Earth's crust is silicon, comprising 27.8% of the crust by mass.
the carbon source from photosynthesis is CO2 in the atmsphere. Carbon is the second most abundant element in living matter.
silicon
Aluminum 7.5 to 8.1%
Siliconsilicon at 28%silicon!
goyttret
That would be silicon, or SiO2
The most abundant metal in the earth crust is aluminium.
aluminum
silicon.
It makes up the majority of the molten core of the earth.