Ch 6 Section 3

Question 1

A familiar example of an ionically bonded compound is

Answer 1

Sodium chloride

Question 2

A sodium atom, NA+ has a charge of

Answer 2

1+

Question 3

A chloride ion, Cl- has a charge of

Answer 3

1-

Question 4

There is an electrical force of attraction between

Answer 4

Oppositely charged ions

Question 5

In sodium chloride the oppositely charged ions combine in a one to one ratio so that each positive charge is

Answer 5

Balanced by a negative charge

Question 6

An ionic compound is composed of positive and negative ions that are

Answer 6

Combined so that the numbers of positive and negative charges are equal

Question 7

Most ionic compounds exist as

Answer 7

Crystalline solids

Question 8

A crystal of any ionic compound is a 3-dimensional network of

Answer 8

Positive and negative ions mutually attracted to one another

Question 9

In contrast to a molecular compound an ionic compound is not composed of

Answer 9

Independent neutral units that can be isolated and examine s

Question 10

The chemical formula of an ionic compound merely represents the

Answer 10

Simplest ratio is the compounds combined ions that gives electrical neutrality

Question 11

The chemical formula of an ionic compound shows the ratio of the i

Answer 11

Ions present in a sample of any size

Question 12

A formula unit is the simplest collection of atoms from which an

Answer 12

Ionic compounds formula can be established

Question 13

In the naming of a monatomic anion the ending of the elements name is replaced with

Answer 13

-ide

Question 14

Most of the rocks and minerals that make up earths crust consist of

Answer 14

Positive and negative ions held together by ionic bonding

Question 15

The ratio of ions in a formula unit depends on the

Answer 15

Charles of the ions combined

Question 16

Electron for notation can be used to demonstrate the

Answer 16

Changes that take place in ionic bonding

Question 17

Ionic compounds do not ordinarily form by the

Answer 17

Combination of isolated atoms

Question 18

Atoms it sodium and other alkali metals readily lose one electron to

Answer 18

Form cations

Question 19

Atoms of chlorine and other halogens readily gain one electron to

Answer 19

Form anions

Question 20

The combination of sodium and chlorine atoms to produce one formula unit of sodium chloride can be represented as follows

Answer 20

Sodium atom + chlorine atom –> sodium cation + chlorine anion

(Refer to txtbk for electron dot notation)

Question 21

The transfer of an electron from the sodium atom to the chlorine atom transforms each atom into an ion with a

Answer 21

Noble gas configuration

Question 22

In an ionic crystal ions minimize their potential energy by combining in an

Answer 22

Orderly arrangement known as a crystal lattice

Question 23

The attractive forces at work within an ionic crystal include those between

Answer 23

Oppositely charged and those between the nuclei and electrons of adjacent ions

Question 24

The repulsive forces at work within an ionic crystal include those between

Answer 24

Like-charged ions and those between electrons of adjacent ions

Question 25

The distances between ions and their arrangement in a crystal represent a

Answer 25

Balance among all these forced

Question 26

In NaCl attraction between the adjacent oppositely charged ions is much stronger than

Answer 26

Repulsion by other ions or the same charge which are farther away

Question 27

The 3-dimensional arrangements of ions and the strength of attraction between them vary with the

Answer 27

Sizes and charges of the hind and the numbers of ions of different charges

Question 28

To compare bond strengths in ionic compounds chemists compare the amounts of energy

Answer 28

Releases when separated ions in a gas come together to form a crystalline solid

Question 29

Lattice energy is the energy released when one

Answer 29

Nike of an ionic crystalline compound is formed from gaseous ions

Question 30

The negative lattice energy values indicate that energy is

Answer 30

Released when the crystals are formed

Question 31

The force that holds ions together in ionic compound is a very strong overall

Answer 31

Attraction. Between positive and negative charges

Question 32

The forces of attraction between molecules are much... Than the forces among formula...

Answer 32

Weaker than the forces among formula units in ionic bonding

Question 33

This difference in the strength of attraction between the basic units of molecular and ionic compounds gives rise to

Answer 33

Different properties in the two types or compounds

Question 34

The melting pt, boiling pt, and harness of a compound depend on how

Answer 34

Strongly it's basic units are attracted to each other

Question 35

Because the forces of attraction between individual molecules are not very strong many molecular compounds melt at

Answer 35

Low temperatures

Question 36

Many molecular compounds are completely.... At room temperature

Answer 36

Gaseous

Question 37

The ions in ionic compounds are held together by strong attractive forced do ionic compounds generally have higher

Answer 37

Melting and boiling points than do molecular compounds

Question 38

Ionic compounds are hard but

Answer 38

Brittle

Question 39

In an ionic crystal even a slight shift of one town of ions relative to another causes a large

Answer 39

Buildup of repulsive forces

Question 40

These repulsive forces in the ionic crystals make it difficult for one layer to move

Answer 40

Relative to another, causing ionic compounds to be hard

Question 41

If one layer is moved, however, the repulsive forces make the layers part

Answer 41

Completely, causing ionic compounds to be brittle

Question 42

In the solid state, ions cannot move, so the compounds are not

Answer 42

Electrical conductors

Question 43

In the solid state, ions cannot move, so the compounds are not

Answer 43

Electrical conductors

Question 44

In the molten state, ionic compounds are electrical conductors because the ions can move

Answer 44

Freely to carry electrical current

Question 45

Many ionic compounds can...in water

Answer 45

Dissolve

Question 46

When ionic compounds dissolve their ions separate from each other and become

Answer 46

Surrounded by water molecules

Question 47

These ions are free to move through the solution so sucks solutions are

Answer 47

Electrical conductors

Question 48

Other ionic compounds do not dissolve in water, however, because the attractions between the water molecules and the ions cannot overcome the

Answer 48

Attraction. Between the ions

Question 49

Certain aims bond covalently with each other to form a group of atoms that has both

Answer 49

Molecular and ionic characteristics

Question 50

A poly atomic ion is a charged group of

Answer 50

Covalently bonded atoms

Question 51

Poly atomic ions combine with ions of opposite charge to form

Answer 51

Ionic compounds

Question 52

The charge of a poly atomic ion results from an excess of

Answer 52

Electrons (negative charge) or a shortage of electrons (positive charge)

Question 53

If the ion is negatively charged add to the total number of cal me electrons a number of electrons corresponding to the

Answer 53

Ions negative charge

Question 54

If the ion is positively charged, subtract from the total number of valence electrons s number of the electrons corresponding not to the ions

Answer 54

Positive charge