Covalent compoundsIonic compounds smallest
particlesmoleculescations and anions (formula units) origin of
bondingelectron sharingelectron transfer forces between
particlesstrong bonds between atoms weak attractions between
molecules strong attractions between anions and cations strong
repulsions between ions of like charge (Brittle) elements
presentclose on the periodic tablewidely separated on the periodic
table metallic elements presentrarelyusually electrical
conductivitypoorgood, when melted or dissolved state at room
temperaturesolid, liquid, or gassolid melting and boiling
pointslowerhigher other namescovalent compoundssalts
Slide 17
1. Which of the following is NOT a characteristic of ionic
compounds? electrons are shared between atoms liquid forms conduct
electricity well solid forms conduct electricity poorly usually
made of metals and nonmetals always contain both cations and anions
2. Which of the following substances will conduct electricity best
when in liquid form? KFH2S C6H12O6CO2 H2O 3. Which of the following
is a characteristic of covalent compounds? usually made of metals
and nonmetals liquid forms conduct electricity well made of
molecules always contain both cations and anions bonding involves
transfer of electrons between atoms 4. Which of the following
substances is made of molecules? ClBrKBr CaBr2BaBr2 NaBr 5. Which
of the following substances will not conduct electricity well when
in liquid form? NaClCaCl2 CCl4TiCl4 AlCl3 6. Which of the following
compounds contains a polyatomic ion? CO2LiCl C6H12O6KBr Na2SO4