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Atoms and Molecules
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12/11/2021 4:40 pm
Topic starter
(a) Define atomic mass unit. What is its symbol?
(b) Define atomic mass of an element.
(c) What is meant by saying that ‘the atomic mass of oxygen is 16’?
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12/11/2021 4:46 pm
(a) One atomic mass unit is defined as exactly one-twelfth the mass of an atom of carbon-12. Its symbol is ‘u’.
(b) The atomic mass of an element is the relative mass of its atom as compared with the mass of a carbon-12 atom taken as 12 units.
(c) It means that one atom of oxygen is 16 times heavier than 1/12 of a C-12 atom.