Question

1. which electron configuration represents a violation of hunds rule for an atom in its ground state? (a) 1s with up - down arrow 2s with up - down arrow 2p with up - down arrow, up arrow, up arrow (b) 1s with up - down arrow 2s with up - down arrow 2p with up arrow, up arrow, empty (c) 1s with up - down arrow 2s with up - down arrow 2p with up arrow, up arrow, up arrow (d) 1s with up - down arrow 2s with up - down arrow 2p with up - down arrow, empty, empty 6. the figure below represents the periodic table and the location of eight different elements. periodic table of the elements periodic table with elements labeled z, x, a, q, t, w, y, d which of the following shows the correct electron configuration for element “y”? a. 1s²2s²2p⁶3s²3p⁶4s²3p⁴ c. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴ b. 1s²2s²2p³3s²3p⁶4s²4d¹⁰4p⁵ d. 1s²2s²2p⁶3s²3p⁶4s²4p⁴ 7. which element is represented in the orbital notation shown below? 1s with up - down arrow 2s with up - down arrow 2p with up - down arrow, up - down arrow, up - down arrow 3s with up - down arrow 3p with up - down arrow, up - down arrow, up arrow a) argon b) sulfur c) fluorine d) chlorine 8. which color of visible light listed below has the most energy? a) violet b) yellow c) blue d) green 9. as a distant star moves away from earth, the light given off by the star has a measurably lower frequency. what happens to the wavelength and energy of the photons of light when the frequency becomes lower? a) when frequency becomes lower, the wavelength becomes longer, and the energy increases. b) when frequency becomes lower, the wavelength becomes shorter, and the energy decreases. c) when frequency becomes lower, the wavelength becomes longer, and the energy decreases. d) when frequency becomes lower, the wavelength becomes shorter, and the energy increases. 10. on the em spectrum, which type of wave listed below has the least energy? a) green has the least energy because it has the shortest wavelength b) blue has the least energy because it has the lowest frequency c) red has the least energy because it has the longest wavelength d) violet has the least energy because it has the highest frequency

Explanation:

5.

Hund's rule states that electrons in degenerate orbitals fill singly first with parallel spins before pairing up. In option (D), the 2p - orbitals do not follow this rule as an electron pairs up before all the 2p - orbitals have one electron each.

Element Y is in the 4th period and 16th group. The electron - configuration for elements in the 4th period and 16th group has the general form \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{4}\) as it has 34 electrons and follows the Aufbau principle.

Count the number of electrons from the orbital notation. There are 17 electrons (\(2 + 2+6 + 2+5\)). Chlorine has 17 electrons.

Answer:

D

6.