boron has two isotopes b-10 and b-11.the percentage abundance of b-10 is 19.8% and that of b-11 is 80.2%.calculate the relative atomic mass (ar) of boron.

boron has two isotopes b-10 and b-11.the percentage abundance of b-10

1.	boron has two isotopes b-10 and b-11.the percentage abundance of b-10 is 19.8% and that of b-11 is 80.2%.calculate the relative atomic mass (ar) of boron.
Answer» 10.80Explanation: 10 * 19.8 + 11 * 80.2/100 198 + 882.2/10010.80.HOPE IT WORKS....