What is Atomic Mass?
Answers
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Atomic Mass is the mass of an atom in a chemical element. It is roughly equivalent to total neutrons and protons present in the atom. It is expressed in atomic mass units (denoted by u). 1amu is equal to the exactly one-twelfth the mass of 1 atom of C-12 and the relative atomic masses of elements is determined with respect to-12 atom.
Atomic masses of Some Elements
Elements | Atomic Mass (u)
Hydrogen = 1
Carbon = 12
Nitrogen = 14
Oxygen = 16
Sodium = 23
Magnesium = 24
Sulfur = 32
Chlorine = 35.5
Calcium = 40
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The mass of an atom of a chemical element expressed in atomic units. This is known as atom mass. It is equivalent to number of protons and neutrons in the atom.
A property closely related to an atom's mass number is its atomic mass. The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu.
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