Chemistry Chapter 9 AnswersStudy Guide

Chapter review: 90-100 even, 105, 108 Solving problems worksheet

Covalent compounds Ionic compoundssmallest particles molecules cations and anions (formula units)

origin of bonding electron sharing electron transferforces between particles

strong bonds between atoms

weak attractions between molecules

strong attractions between anions and cations

strong repulsions between ions of like charge(Brittle)

elements present close on the periodic table widely separated on the periodic table

metallic elements present

rarely usually

electrical conductivity poor good, when melted or dissolved

state at room temperature

solid, liquid, or gas solid

melting and boiling points

lower higher

other names covalent compounds salts

1. Which of the following is NOT a characteristic of ionic compounds?electrons are shared between atoms

liquid forms conduct electricity wellsolid forms conduct electricity poorly

usually made of metals and nonmetalsalways contain both cations and anions

2. Which of the following substances will conduct electricity best when in liquid form?

KF H2SC6H12O6 CO2 H2O3. Which of the following is a characteristic of covalent compounds?

usually made of metals and nonmetalsliquid forms conduct electricity wellmade of moleculesalways contain both cations and anionsbonding involves transfer of electrons between atoms

4. Which of the following substances is made of molecules?ClBr KBr

CaBr2 BaBr2 NaBr5. Which of the following substances will not conduct electricity well when in liquid form?

NaCl CaCl2CCl4 TiCl4 AlCl36. Which of the following compounds contains a polyatomic ion?

CO2 LiClC6H12O6 KBr Na2SO4