boron has two naturally occuring isotopes,, 10B (19.9%) and 11B(80. althought the b2 molecule doesn not exist naturally on earth, it been been...

boron has two naturally occuring isotopes,, 10B (19.9%) and 11B(80.1. althought the b2 molecule doesn not exist naturally on earth, it been been produced in the laboratory and been observed in stars.(A) how many molecules are possible? (b) what are the masses and precent abundances of each?