The answer will depend on the elements which you have included in the 98% and the precision of those figures.
that would be oxygen and nitrogen
Group 2 elements in the periodic table are the alkaline earth metals.
No,but group 2 are alkaline earth elements
3% of earth's surface is covered by rainforest's.
The elements of the second group are called the Alkaline Earth metals.
Trees
2%
About 2%
2
Nikel and Iron. ;]
As of 2014, there are 17 known rare earth elements. In the early 1800s, only 2 were know.
Sodium, magnesium and pottassium are about 2% of the earth EACH!