Atomic mass unit Formula
The atomic mass is expressed to how many times an atom of substance is heavier Than 1/12th . Mass of carbon -12 atom.
Contents
- Atomic mass unit (earlier abbreviated as amu bug according to the latest IUPAC recommendations it is now written as ‘u’ that is unified mass.
- Atomic mass unit (amu) or unified mass (u) .
- 12 amu is weight = one carbon atom.
- 1 amu or u = 1/ 12 Weight of one 12C atom.
- One atomic mass unit is mass unit equal to exactly one twelfth (1/12th) the mass of one atom of carbon-12 .
Formula:
- Carbon-12 is presents in abundantly ( large numbers) in everywhere.
- Carbon-12 are moderately reactive.
- How the value of carbon-12 1/12 are 1.6605×10-24
1 amu or 1 u = 1/12 ×mass of 12C atom
= 1/12× 1.9926 ×10-24
1 amu or 1 u = 1.6605×10-24
Example :
Calculate Atomic mass unit of hydrogen atom?
Solution:
Formula:
Mass of one atom of hydrogen = 1.673× 10-24
Mass of one atom of C-12 = 1.6605×10-24
So put the value in formula,
= 1.007 OR 1u