Problem 1
State the number of valence electrons for a lithium atom and a chlorine atom.
Problem 2
State the number of valence electrons for a hydrogen atom and a bromine atom.
Problem 3
State the number of valence electrons for a lithium ion and an chloride ion in an ionic bond.
Problem 4
State the number of valence electrons for a hydrogen atom and a bromine atom in a covalent bond.
Problem 5
Predict whether each of the following is held together by ionic or covalent bonds: (a) aluminum chloride, \(\mathrm{AlCl}_{3}\) (b) water, \(\mathrm{H}_{2} \mathrm{O}\) (c) sulfur trioxide, \(S O_{3}\) (d) iron(II) sulfate, \(\mathrm{FeSO}_{4}\)
Problem 6
Predict whether each of the following is held together by ionic or covalent bonds: (a) zinc bromide, \(\mathrm{ZnBr}_{2}\) (b) carbon dioxide, \(\mathrm{CO}_{2}\) (c) iodine heptafluoride, \(\mathrm{IF}_{7}\) (d) lead(II) sulfate, \(\mathrm{PbSO}_{4}\)
Problem 8
State whether the representative particle in each of the following substances is a formula unit or a molecule: (a) methanol, \(\mathrm{CH}_{3} \mathrm{OH}\) (b) cobaltous chloride, \(\mathrm{CoCl}_{2}\) (c) acetone, \(\mathrm{CH}_{3} \mathrm{COCH}_{3}\) (d) stannous carbonate, \(\mathrm{SnCO}_{3}\)
Problem 9
State whether the representative particle in each of the following substances is an atom, a formula unit, or a molecule: (a) propane, \(\mathrm{C}_{3} \mathrm{H}_{8}\) (b) platinum, \(\mathrm{Pt}\) (c) hematite, \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) (d) sulfur, \(S_{8}\)
Problem 10
State whether the representative particle in each of the following substances is an atom, a formula unit, or a molecule: (a) xenon, Xe (b) phosphorus, \(\mathrm{P}_{4}\) (c) xenon trioxide, \(\mathrm{XeO}_{3}\) (d) magnetite, \(\mathrm{Fe}_{3} \mathrm{O}_{4}\)
Problem 11
Use the periodic table to predict an ionic charge for each of the following metal ions: (a) Na ion (b) Ba ion (c) Ga ion (d) Sn ion
