10. Periodic Properties of the Elements

Consider the following electron configurations to answer the question.

(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

Which ground state electron configuration has the smallest number of valence electrons?

Which of the following sketches best represents a 3d atomic orbital?

Which of the following electron configurations represents a phosphorus atom (atomic number 15) in an excited state?

Which one of the following orbitals can hold two electrons?

Which subshells are present in the n = 5 shell?

Which of the following electron orbital diagrams represents a violation of the aufbau principle?

Consider the following electron configurations to answer the question.

(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

An example of an excited state (higher energy level than the ground state) is ________.

Which of the following best describes the difference between an orbit and an orbital in atomic theory?

How many subshells are present in the n = 4 shell?

If a shell can hold a maximum of 32 electrons, what is the principal quantum number n for that shell?

How many subshells are present in the n = 3 shell?

Which of the following valence electron configurations corresponds to an atom in an excited state?

In the metal complex Na[Co(CO)2(CN)4], how many d electrons are present in the cobalt (Co) atom?

Which of the following orbital-filling diagrams for the 2p subshell violates Hund's rule?

Which statement best explains how the orbital configuration of neutral atoms is related to the atom's chemical properties?