What is 1 atomic mass unit equal to?

1 Answer
Dec 7, 2015


#1 a.m.u.=1.6726219xx10^(-27) kg#.


1 atomic mass unit (a.m.u.) is the mass of a proton or a neutron which is equal to #1.6726219xx10^(-27) kg#.

The mass of a Hydrogen atom is 1 a.m.u. But, also we can say that the molar mass of a hydrogen is equal to #1g/"mol"# and this is because:

#1.6726219xx10^(-24) gxx6.022xx10^(23)=1.007"g/mol"#

which is close to the mass that you find in a periodic table.