A UNIT OF MASS USED TO EXPRESS ATOMIC AND MOLECULAR WEIGHTS WHICH IS EQUAL TO THE ONE-TWELFTH OF THE MASS OF AN ATOM OF CARBON.
THE ATOMIC MASS IS USEFUL IN CHEMISTRY WHEN IT PAIRED WITH MOLE CONCEPT, ATOMIC MASS OF AN ELEMENT MEASURED IN AMU IS THE SAME AS THE MASS IN GRAMS OF THE ONE MOLE OF AN ELEMENT .
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Explanation:
AMU.
IT STANDS FOR ATOMIC MASS UNIT.
A UNIT OF MASS USED TO EXPRESS ATOMIC AND MOLECULAR WEIGHTS WHICH IS EQUAL TO THE ONE-TWELFTH OF THE MASS OF AN ATOM OF CARBON.
THE ATOMIC MASS IS USEFUL IN CHEMISTRY WHEN IT PAIRED WITH MOLE CONCEPT, ATOMIC MASS OF AN ELEMENT MEASURED IN AMU IS THE SAME AS THE MASS IN GRAMS OF THE ONE MOLE OF AN ELEMENT .
EXAMPLE :
ATOMIC MASS OF IRON IS 55.847 AMU