bonding

Question 1

ionic bonding deffenition?

Answer 1

the electrostatic force of attraction between oppositely charged ions formed by electron transfer.

Question 2

what is the structure of an ionic crystal?

Answer 2

giant lattice of ions

Question 3

is ionic bonding stronger when ions are larger or smaller?

Answer 3

smaller

Question 4

are melting points higher when ionic bonding is stronger or weaker?

Answer 4

stronger

Question 5

is ionic bonding stronger when ions have higher or lower charges?

Answer 5

higher

Question 6

does ionic radii increase or decrease down a group?

Answer 6

increase

Question 7

covalent bond deffenition?

Answer 7

shared pair of electrons

Question 8

when does a dative covalent bond form?

Answer 8

when the shared pair of electrons in the covalent bond come from only one of the bonding atoms.

Question 9

metallic bonding defenition?

Answer 9

the electrostatic force of attraction between the positive metal ions and the delocalised electrons.

Question 10

what are the three main factors that affect the strength of metallic bonds?

Answer 10

number of protons / strength of nuclear attraction
number of delocalised electrons per atom
size of ion

Question 11

if there are more protons is the metallic bond stronger or weaker?

Answer 11

stronger

Question 12

if there are more delocalised electrons is the metallic bond stronger or weaker?

Answer 12

stronger

Question 13

if the ion is bigger, is the metallic bond stronger or weaker?

Answer 13

weaker

Question 14

if the metallic bonding is stronger, is the melting point higher or lower?

Answer 14

higher

Question 15

when is the only time we refer to molecules?

Answer 15

when talking about simple molecular substances

Question 16

do ionic substances have high or low melting/boiling points?

Answer 16

high

Question 17

do simple molecular substances hive high or low melting/boiling points?

Answer 17

low

Question 18

do macromolecular substances have high or low melting/boiling points?

Answer 18

high

Question 19

do metallic substances have high or low melting/boiling points?

Answer 19

high

Question 20

what is the solubility of ionic substances in water like?

Answer 20

generally good

Question 21

what is the solubility of simple molecular substances in water like?

Answer 21

generally poor

Question 22

what is the solubility of macromolecular substances in water like?

Answer 22

insoluble

Question 23

what is the solubility of metallic substances in water like?

Answer 23

insoluble

Question 24

what is the conductivity of ionic substances like when solid?

Answer 24

poor

Question 25

what is the conductivity of simple molecular substances like when solid?

Answer 25

poor

Question 26

what is the conductivity of macromolecular substances like when solid?

Answer 26

poor

Question 27

what is the conductivity of metallic substances like when solid?

Answer 27

good

Question 28

conductivity when molten of ionic substances?

Answer 28

good

Question 29

conductivity when molten of simple molecular substances?

Answer 29

poor

Question 30

conductivity when molten of macromolecular substances?

Answer 30

poor

Question 31

conductivity when molten of metallic substances?

Answer 31

good

Question 32

general description of ionic substances?

Answer 32

crystalline substances

Question 33

general description of simple molecular substances?

Answer 33

mostly gases and liquids

Question 34

general description of macromolecular substances?

Answer 34

solids

Question 35

general description of metallic substances?

Answer 35

shiny malleable metal

Question 36

2 bonding pairs 0 lone pairs

Answer 36

180 linear

Question 37

3 bonding pairs 0 lone pairs

Answer 37

120 trigonal planar

Question 38

4 bp 0 lp

Answer 38

109.5 tetrahedral

Question 39

3bp 1lp

Answer 39

107 trigonal pyramidal

Question 40

2bp 2lp

Answer 40

104.5 bent

Question 41

5bp 0lp

Answer 41

120 and 90 trigonal bipyramidal

Question 42

6bp 0lp

Answer 42

90 octahedral

Question 43

4bp 2lp

Answer 43

90 square planar

Question 44

what is electronegativity?

Answer 44

the relative tendency of an atom in a covalent bond in a molecule to attract electrons in a covalent bond to itself

Question 45

does electronegativity increase or decrease across a period?

Answer 45

increase

Question 46

does electronegativity increase or decrease as the number of protons increases?

Answer 46

increase

Question 47

does electronegativity increase or decrease as thee atomic radius increases?

Answer 47

decrease

Question 48

does electronegatvity increase or decrease down a group?

Answer 48

decrease

Question 49

does elctronegativity increase or decrease as distance between nucleus and outer electrons increases?

Answer 49

decrease

Question 50

does electronegatvity increase or decrease as sheilding increases?

Answer 50

decrease

Question 51

A compound containing elements of similar electronegativity and hence a small electronegativity difference will be purely what?

Answer 51

covalent

Question 52

A compound containing elements of very different electronegativity and hence a very large electronegativity difference (> 1.7) will be what?

Answer 52

ionic

Question 53

when does a polar covalent bond form?

Answer 53

when the elements in the bond have different electronegativities

Question 54

why are symetrical molecules never polar, even if they have polar bonds?

Answer 54

individual dipoles will cancel out

Question 55

what do VDW forces not occur in?

Answer 55

ionic substances

Question 56

if there are more electrons in the molecule is there a higher or lower chance that temporary dipoles will form?

Answer 56

higher

Question 57

do boiling points increase or decrease down group 7?

Answer 57

increase

Question 58

what do permanent dipole-dipole forces occur between?

Answer 58

polar molecules

Question 59

are dipole-dipole forces weaker than VDW?

Answer 59

no

Question 60

what needs to be present for a hydrogen bond?

Answer 60

N or O or F

Question 61

is hydrogen bonding strongest or weakest intermolecular force?

Answer 61

strongest