An excited potassium atom emits a specific amount of energy when one of its electrons moves from

NY Regents Chemistry Jan 2023 exam

3. An excited potassium atom emits a specific amount of energy when one of its electrons moves from (1) the first shell to the fourth shell

(2) the second shell to the fourth shell

(3) the fourth shell to the fifth shell

(4) the fourth shell to the second shell

Solution: When an electron moves from a lower to a higher energy state, it absorbs energy. When an electron moves from a higher to a lower energy state, it emits energy. Since this electron emits energy we are looking for going from higher to lower state which is choice 4

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