Chemistry

Question 1

Define Chemical Bond

Answer 1

Attraction between atoms as a result of simultaneous attraction between the nuclei and outer electrons

Question 2

Define Covalent Bond:

Answer 2

Sharing of electrons between two atoms to form a molecule

Question 3

Define Non polar covalent bond:

Answer 3

Bond in which there’s an equal distribution of charges

Question 4

Define polar covalent bond:

Answer 4

Bond in which there’s an unequal distribution of charges

Question 5

What is an ionic bond?

Answer 5

Bond whereby electrons are transferred from one atom to another

Question 6

Ionic bonds occur between which two groups/types of elements

Answer 6

Metals and Nonmetals

Question 7

∆EN for ionic bonds

Answer 7

∆EN>2.1

Question 8

∆EN for strong polar covalent bonds

Answer 8

∆EN>1

Question 9

∆EN for weak polar covalent bonds

Answer 9

∆EN<1

Question 10

∆EN for non polar covalent bonds

Answer 10

∆EN≤0.4

Question 11

∆EN for polar covalent bonds

Answer 11

∆EN≥0.5

Question 12

Define Bond energy:

Answer 12

Amount of energy needed to break down a molecule

Question 13

Define Bond Length:

Answer 13

Average distance between nuclei of two bonded atoms

Question 14

List 5 types of IMF’s

Answer 14

1. Strong Hydrogen bond
2. Ion dipole
3. Dipole dipole
4. Induced dipole
5. Induced dipole induced dipole

Question 15

Which is the strongest IMF

Answer 15

Hydrogen bond

Question 16

Which is the weakest IMF

Answer 16

London forces

Question 17

Define boiling point:

Answer 17

Temperature at which vapour pressure is equal to atmospheric pressure

Question 18

Define melting point:

Answer 18

Temperature at which the solid phase and liquid phase of a substance are at equilibrium

Question 19

Define vapour pressure:

Answer 19

Pressure exerted by vapour at equilibrium with its liquid in a closed system

Question 20

IMF’s are directly proportional to….&….?

Answer 20

Boiling point and melting point

Question 21

IMF’s are indirectly proportional to…..?

Answer 21

Vapour pressure

Question 22

Define strong hydrogen bond:

Answer 22

Electrostatic attraction between hydrogen bonded to other atoms of higher electronegativity

Question 23

Define ion dipole

Answer 23

Bond between ions and polar substances (due to opposite charges)

Question 24

Define dipole dipole:

Answer 24

Bond between two dipoles

Question 25

Induced dipole

Answer 25

Bond whereby a non polar molecule creates a polar molecule

Question 26

Define Induced dipole- induced dipole or London forces

Answer 26

Bond between two induced dipoles

Question 27

Define electronegativity:

Answer 27

Tendency of an atom to attract or repel other atoms

Question 28

List the 5 major molecular shapes

Answer 28

1. Iinear
2. Angular/bent
3. Trigonal planar
4. Trigonal pyramidal
5. Tetrahedral

Question 29

Draw a trigonal pyramidal shaped molecule

Answer 29

on book

Question 30

Draw a tetrahedral shaped molecule

Answer 30

on book

Question 31

Draw a angular shaped molecule

Answer 31

on book

Question 32

Draw a trigonal planar molecule shape

Answer 32

on book

Question 33

Draw a linear molecule shape

Answer 33

on book