Problem 72
Write the abbreviated electron configuration of the \(\mathrm{Co}^{3+}\) ion. How many unpaired electrons does the ion contain?
Problem 73
Write Lewis symbols for the following atoms: (a) \(\mathrm{Si}\) (b) Sb, (c) \(\mathrm{Ba}\) (d) Al, (e) \(S\).
Problem 74
Write Lewis symbols for the following atoms: (a) \(\mathrm{K}\) (b) Ge, (c) As, (d) \(\mathrm{Br}\) (e) Se.
Problem 75
Use Lewis symbols to diagram the reactions between (a) \(\mathrm{Mg}\) and \(\mathrm{S}\), (b) \(\mathrm{Mg}\) and \(\mathrm{Cl}\), and (c) \(\mathrm{Mg}\) and \(\mathrm{N}\).
Problem 76
Use Lewis symbols to diagram the reactions between (a) \(\mathrm{Ca}\) and \(\mathrm{Br}\), (b) \(\mathrm{Al}\) and \(\mathrm{O},\) and (c) \(\mathrm{K}\) and \(\mathrm{S}\).
Problem 81
Use Lewis structures to diagram the formation of (a) \(\mathrm{Br}_{2}\), (b) \(\mathrm{H}_{2} \mathrm{O},\) and \((\mathrm{c}) \mathrm{NH}_{3}\) from neutral atoms.
Problem 82
Use Lewis structures to diagram the formation of (a) \(\mathrm{CH}_{4}\), (b) \(\mathrm{PH}_{3}\) (c) \(\mathrm{F}_{2}\) from neutral atoms
Problem 83
Chlorine tends to form only one covalent bond because it needs just one electron to complete its octet. What are the Lewis structures for the simplest compound formed by chlorine with (a) nitrogen, (b) carbon, (c) sulfur, and (d) bromine?
Problem 84
Use the octet rule to predict the formula of the simplest compound formed from hydrogen and (a) selenium, (b) arsenic, and (c) silicon.
Problem 85
What would be the formula for the simplest compound formed from (a) phosphorus and chlorine, (b) carbon and fluorine, and (c) iodine and chlorine?
