Understanding Key Ideas p18310. (a) Electron(b) Proton, electron(c) Electron(d) Neutron(e) Proton, neutron(f) Proton11. In a covalent compound, atoms bond togetherby sharing a pair of electrons. In an ionic compound,ions form as a result of the transfer ofelectrons, and then ions of opposite chargeattract each other.12. (a) Bohr and Lewis diagrams are similar inthat they show the valence electrons andhow they result in bond formation.(b) They are different in that Bohr diagramsshow all the electrons in each atom or ion,while Lewis diagrams show only valenceelectrons.13. (a)

(b)

(c)

14. (a)

(b)

(c)

Understanding Key Ideas p2017. (a) NaBr(b) CaF2(c) FeBr3(d) AuI(e) V2O5(f) MoN(g) (NH4)3PO4(h) KNO3(i) Mn(ClO4)28. (a) Lithium fluoride(b) Magnesium iodide(c) Iron(III) oxide(d) Silver nitride(e) Gold(I) nitride(f) Platinum (IV) sulphate(g) Ammonium carbonate(h) Cesium nitrate9. (a) SO2(b) ClF(c) NI3(d) N2O(e) N2O4(f) SeF210. (a) Phosphorus pentafluoride(b) Tetraphosphorus decaoxide(c) Carbon monoxide(d) Sulfur hexafluoride(e) Xenon trioxide(f) Nitrogen dioxide(g) Oxygen difluoride11. Formula Ionic orCovalent?

Formula Ionic or Covalent? Name of CompoundA Cl2O covalent dichlorine monoxideB CO2 covalent carbon dioxideC CoO ionic cobalt(II) oxideD CO covalent carbon monoxideE PbO2 ionic lead(IV) oxideF MgCl2 ionic magnesium chlorideG PtCl2 ionic platinum(II) chlorideH SCl2 covalent sulfur dichlorideH NaCH3COO ionic sodium acetatej NH4CH3COO ionic ammonium acetate