Chapter 4

Question 1

lattice

Answer 1

regularly repeating arrangement of atoms

Question 2

ionic bond

Answer 2

electrostatic attraction between cations and anions. metal and non metal

Question 3

Properties of ionic bond

Answer 3

high melt point
water soluble
conduct elec when molten

Question 4

types of covalent bonds

Answer 4

SIngle, Double, Triple, Dative(both electrons from 1 atom)

Question 5

Electronegativity

Answer 5

how much and atom attracts a shared pair of electrons

Question 6

Non polar covalent

Answer 6

electrons shared equally

Question 7

polar covalent

Answer 7

electrons shared unequally

Question 8

Metallic bonding

Answer 8

attraction between positive lattice and negative seaof delocalised elecs

Question 9

properties of metallic bonding

Answer 9

high m.p. and b.p.
Good elec and heat conductivity
ductile and malleable

Question 10

Van der waals forces

Answer 10

weak forces between atoms because of temporary dipoles

Question 11

permanent dipole dipole forces

Answer 11

attraction betwwen atoms with permanent dipoles

Question 12

valence shell electron pair repulsion
(VSEPR) Theory

Answer 12

Predicts shapes of molecules with arrangements based on a central atom

Question 13

Bond strength and bond length are…

Answer 13

Inversely proportional

Question 14

atomic radius increases going

Answer 14

down and left

Question 15

ionic radii increases as

Answer 15

You go down

Question 16

induced dipole

Answer 16

caused by an instantaneous dipole

Question 17

instantaneous dipole

Answer 17

When electrons move to one side of an atom for a short period.
the part where electrons move to becomes delta negative and other side is delta +

Question 18

permanent dipole dipole interaction

Answer 18

Attraction between 2 atoms with permanentdipoles

Question 19

in hydrogen bonding hydrogens are always ______ and must connect to the ____

Answer 19

delta+
lone pair of electrons directly

Question 20

intermolecular forces in hydrogen bonds are

Answer 20

very strong and can increase m.p and b.p.

Question 21

ionic compounds at room temp and pressure

Answer 21

Solid
High m.p. and b.p.
high enthalpy changes
Takes lots of energy to overcome electrostatic

Question 22

metals at room temp and pressure

Answer 22

Solid, except mercury
High m.p. and b.p. (only trans elements)
high enthalpy changes
lots of energy to overcome attraction in sea of deloca electrons

Question 23

covalent compounds at room temp and pressure

Answer 23

liquids or gas
low m.p. & b.p.
low enth changes

Question 24

electroneg < 0,4

Answer 24

non polar covalent

Question 25

0,4< electroneg < 1,7

Answer 25

polar covalent

Question 26

1.7 < electroneg

Answer 26

ionic