Question

ਸਿਹਤ ਸਿੱਖਿਆ ਦੀਆ ਕਿਹਤੀਆਂ ਕਿਸਮਾਂ ਹਨ ?
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Answer 1

Answer:

Postulates of Bohr's Model of an Atom

In an atom, electrons (negatively charged) revolve around the positively charged nucleus in a definite circular path called orbits or shells. Each orbit or shell has a fixed energy and these circular orbits are known as orbital shells.