chapter 6 section 3

Question 1

an ionic compound is not represented by a molecular formula because an ionic compounds

Answer 1

lacks molecules

Question 2

compared with the energies of neutral atoms that form the ions, a crystal lattice has

Answer 2

lower potential energy

Question 3

compared with solid ionic compounds, solid molecular compounds generally

Answer 3

have lower melting points

Question 4

because strong attractive forces hold the layers in an ionic crystal in relatively fixed positions, ionic compounds

Answer 4

are hard, brittle, and are not electrical conductors as solids

Question 5

the arrangement of ions within a crystal structure and the strengths of the attractions between them vary with the

Answer 5

sizes of the ions, charges of the ions, and number of ions of different charges

Question 6

the energy released when one mole of an ionic crystalline solid is formed from ions in the gas state is known as

Answer 6

lattice energy

Question 7

some ionic compounds do not dissolve in water because

Answer 7

the attractions between the water molecules and the ions are not as strong as the attractions between the ions

Question 8

a charged group of covalently bonded atoms is known as a

Answer 8

polyatomic ion

Question 9

simplest collection of atoms from which an ionic compound’s formula can be established

Answer 9

formula unit