Scientists have estimated that the area of earth covered by water is 70.98 percent ,or 362,031,100 km^2.express this value in scentific notation

3.620311*10^8 km^2
Since their osnt a period at the end of this number then the two 0's at the end are not counted as significant numbers

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.