Question

what is the correct answer with explaination

4. Choose the answer that best completes the following: The existence of atomic line spectra indicates that... a. the energy of a photon depends on its frequency. b. all orbitals in s subshells must be spherical in shape. c. electrons in atoms orbit the nucleus in a circular path. d. electrons in atoms are restricted to certain energy levels. e. isotopes of an element contain different numbers of protons in the nucleus.

Answer 1

Correct option: option d = electrons in atoms are restricted to certain energy levels.

Explanation:

Since electrons in atoms are restricted to certain energy levels. When light of certain frequency fall on the atom , then electrons in atoms get excited to higher energy levels. So we get atomic absorption line spectra.

So correct option = option d

Important point:

Atomic line spectra tells that electron in the atom are restricted to different energy levels.

For option a, the energy of photon depends on its frequency which is always true. So this statement has no relation with atomic line spectra. So option a is incorrect.

Since shape of orbital and movement of electron also have no relation with atomic line spectra. So option b and option c is incorrect.

Isotope also has no relation with atomic line spectra. So option e is incorrect.