Which statement describes the relative energy of the electrons in different electron shells of a krypton atom in the ground state?
Regents Chemistry June 2026
31 Which statement describes the relative energy of the electrons in different electron shells of a krypton atom in the ground state?
(1) An electron in the first shell has more energy than an electron in the third shell.
(2) An electron in the third shell has more energy than an electron in the second shell.
(3) An electron in the second shell has less energy than an electron in the first shell.
(4) An electron in the third shell has less energy than an electron in the second shell.
Solution:
An electron in the shell closer to the nucleus has less energy than the one further away from the nucleus. Therefore, an electron in the third shell has more energy than an electron in the second shell. Choice 2 is the correct answer.
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