your self and you should go eat a banana and it will help you find ther answeR!!!!! RETARD
2.8% not i mean 4.9%
Most of the chlorine on Earth exists as sodium chloride or common salt. It is the 21st most abundant element in the Earth's crust. Chlorine has two principal isotopes, 35Cl (75.78%) and 37Cl (24.22%).
i really dont know
Sodium, magnesium and pottassium are about 2% of the earth EACH!
The abundance of thorium in the Earth crust is approx. 12 ppm.
2.8% not i mean 4.9%
The abundance of radium in the earth crust is 9.10-10 mg/kg.
Sodium
Most of the chlorine on Earth exists as sodium chloride or common salt. It is the 21st most abundant element in the Earth's crust. Chlorine has two principal isotopes, 35Cl (75.78%) and 37Cl (24.22%).
Approximately 100 free elements are found in the earth's crust. There are eight elements that are found in somewhat of an abundance. These include: oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium.
Protactinium is so scarce that the abundance in the Earth crust was not determined.
Sodium is considered a monoisotopic chemical element - sodium-23; the isotopes sodium-22 and sodium-24 exist only in ultrtraces.
magnesium
It is mostly fond in the oceanic abundance
There is a large countity
-2.3
Earth