10. Periodic Properties of the Elements

Give the set of four quantum numbers that represent the indicated electron in each of the following elements. 

Mg (7th electron) 

Give the set of four quantum numbers that represent the indicated electron in each of the following elements. 

Cl^– (18th electron)

Give the set of four quantum numbers that represent the indicated electron in each of the following elements. 

Cr³⁺ (21^st electron) 

(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

An example of a configuration of a transition metal is ________.

(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

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

(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

Which represents the ground state electron configuration for a halogen?

(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

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

In what way are the electron configurations of H, Li, Na, K, Rb, and Cs similar?