Chemical bonding

Question 1

Chemical bond

Answer 1

lasting attraction between atoms, ions or molecules that enables formation of chemical compounds

Question 2

Covalent bond

Answer 2

Form of chemical bonding where pairs of e- shared between atoms

Question 3

Valency

Answer 3

Number of e- lost or gained to have full outer shell

Question 4

Properties of covalent

Answer 4

MP+BP generally lower than those of ionic compound, generally more flexible than ionic, generally not soluble water, generally do not conduct electricity when dissolved water

Question 5

Non-polar covalent

Answer 5

Electronegativity difference = 0

Question 6

Weak polar covalent

Answer 6

0<Electronegativity difference<1

Question 7

Strong polar covalent

Answer 7

1<=Electronegativity difference<2.1

Question 8

Ionic

Answer 8

Electronegativity difference>=2.1

Question 9

Ionic bond

Answer 9

1 or more e- transferred from 1 atom to another

Question 10

Properties of ionic compounds

Answer 10

Ions in lattice structure, ionic solids crystalline at room temp, often hard high MP, brittle, can’t conduct electricity as solids but can as ionic solns

Question 11

Metallic bond

Answer 11

electrostatic attraction between positive charge atomic nuclei of metal atoms and delocalised sea of valence e- in metal.