Question

please tell me answer urgent​

Answer 1

Answer:

12.In an atom, electrons(negatively charged) revolve around the positively charged nucleus in a definite circular path called as orbits or shells. 2. Each orbit or shell has a fixed enery and these circular orbits are known as orbital shells.

Explanation:

Answer 2

Ans1.Electric orbit the nucleus in orbit that have a set size and energy.

the energy of orbit is related to its size.the lowest energy is found in the smallest orbit .

Radiation is absorbed or emitted when an electrons moves from one orbit to another...