Question

why do atom absorb photon since it makes it unstable??​

Answer 1

$\textsf{When an electron is hit by a }$ $\textsf{photon of light, it absorbs the quanta}$ $\textsf{of energy the photon was carrying}$ $\textsf{and moves to a higher energya}$ $\textsf{ state. Electrons therefore have to }$ $\textsf{jump around within the atom as }$ $\textsf{they either gain or lose energy. }$

Answer 2

When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. Electrons therefore have to jump around within the atom as they either gain or lose energy.

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