Problem 48
Arrange the elements in each of the following groups in (b) F, order of increasing electron affinity: (a) \(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) Cl. Br. I.
Problem 49
Specify which of the following elements you would expect to have the greatest electron affinity: \(\mathrm{He}, \mathrm{K}, \mathrm{Co}, \mathrm{S}, \mathrm{Cl}\)
Problem 50
Considering their electron affinities, do you think it is possible for the alkali metals to form an anion like \(\mathrm{M}^{-}\), where M represents an alkali metal?
Problem 53
What do we mean when we say that two ions or an atom and an ion are isoelectronic?
Problem 54
Is it possible for the atoms of one element to be isoelectronic with the atoms of another element? Explain.
Problem 56
A \(\mathrm{M}^{2+}\) ion derived from a metal in the first transition metal series has four electrons in the \(3 d\) subshell. What element might \(\mathrm{M}\) be?
Problem 57
A metal ion with a net +3 charge has five electrons in the \(3 d\) subshell. Identify the metal
Problem 58
Write the ground-state electron configurations of the following ions: (a) \(\mathrm{Li}^{+},(\mathrm{b}) \mathrm{H}^{-},(\mathrm{c}) \mathrm{N}^{3-},(\mathrm{d}) \mathrm{F}^{-},\) (e) \(\mathrm{S}^{2-}\) (f) \(\mathrm{Al}^{3+},(\mathrm{g}) \mathrm{Se}^{2-}\) (h) \(\mathrm{Br}^{-}\) (i) \(\mathrm{Rb}^{+},(\mathrm{j}) \mathrm{Sr}^{2+},(\mathrm{k}) \mathrm{Sn}^{2+}\) (1) \(\mathrm{Te}^{2-} \cdot(\mathrm{m}) \mathrm{Ba}^{2+}\) (n) \(\mathrm{Pb}^{2+}\) (o) \(\mathrm{In}^{3+},(\mathrm{p}) \mathrm{Tl}^{+}\) (a) \(\mathrm{Tl}^{3+}\)
Problem 59
$$ \begin{aligned} &\text { Group the species that are isoelectronic: } \mathrm{Be}^{2+}, \mathrm{F}^{-}, \mathrm{Fe}^{2+}\\\ &\mathrm{N}^{3-}, \mathrm{He}, \mathrm{S}^{2-}, \mathrm{Co}^{3+}, \mathrm{Ar} \end{aligned} $$
Problem 60
Write the ground-state electron configurations of the following transition metal ions: (a) \(\mathrm{Sc}^{3+},(\mathrm{b}) \mathrm{Ti}^{4+}\) (c) \(\mathrm{V}^{5+}\) (e) \(\mathrm{Mn}^{2+},(\mathrm{f}) \mathrm{Fe}^{2+},(\mathrm{g}) \mathrm{Fe}^{3+}\) (d) \(\mathrm{Cr}^{3+}\) (h) \(\mathrm{Co}^{2+}\) (i) \(\mathrm{Ni}^{2+},(\mathrm{j}) \mathrm{Cu}^{+},(\mathrm{k}) \mathrm{Cu}^{2+},\) (l) \(\mathrm{Ag}^{+}\) \((\mathrm{m}) \mathrm{Au}^{+},(\mathrm{n}) \mathrm{Au}^{3+},(\mathrm{o}) \mathrm{Pt}^{2+}\)
