One atomic mass unit is exactly equal to __________ of the mass of one atom of carbon-12.
One atomic mass unit is a mass unit equal to exactly one twelfth (1/12th) the mass of one atom of ___________.
Calculate the atomic mass of Alluminium in a unit-u' where 1u'=1/14*massof one carbon-12 atom.Given that atomic mass of Alluminium is 27.