Question

2
Define atomic mass unit
What is polyatomic ion? Give an example
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Answer 1

Answer:

a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12 is called atomic mass unit Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms. The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit.

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