BONDING

Question 1

Ionic bonding

Answer 1

The electrostatic force between positive (cation) and negative (anions) ions

Question 2

Ionic bonds have

Answer 2

1. high melting and boiling points
2. High temperature needed to overcome these electrostatic forces of attraction

Question 3

In ioni bonding melting points are higher for

Answer 3

lattices with greater charges on ions due to the strong attraction between ions

Question 4

Does not conduct electricity unless

Answer 4

1. molten
2. or dissolved in a solvent

Question 5

if ionic bonds are in polar solvents

Answer 5

they break down the lattice and surround each ion in solution

Question 6

outer shell electrons from a metal are transferred to

Answer 6

the outer shell of a non-metal

Question 7

Ionic compounds form

Answer 7

Giant ionic lattices

Question 8

3 key properties of ionic compounds

Answer 8

1. High melting and boiling points
2. solubility
3. does not conduct electricity unless molten or dissolved in polar solvents

Question 9

the solid state:ionic compounds

Answer 9

• The ions are in a fixed position
• no mobile charge carriers

Question 10

The liquid state: ionic compounds

Answer 10

• solid ionic lattice breaks down
• The ions are now free to due to there being mobile carriers

Question 11

Covalent Bonding is

Answer 11

Strong electrostatic attraction between a shared pair of electrons and the nuclei of bonded atom

Question 12

In covalent bonding

Answer 12

The atrraction is localised between electrons

Question 13

Diuble covalent bond

Answer 13

electrostatic atttraction between 2 shared pairs of electrons and the nuclei of bonding atoms

Question 14

Dative covalent bond

Answer 14

a covalent bond in which the shared pair of electrons has been supplied by one of the bonding atoms

Question 15

Covalent bonding structures

Answer 15

1. small covalent structure
2. giant covalent structure
3. charged polyatomic ion

Question 16

A covalent bond is the overlap

Answer 16

of atomic orbitals

Question 17

In a covalent bond

Answer 17

The attraction is localised

Question 18

Ionic bonding examples

Answer 18

-sodium chloride
-magnesium oxide

Question 19

average bond enthalpy is

Answer 19

a measure of avergae energy needed to break the bond

Question 20

Dative covalent bond

Answer 20

a bond in where both of the shared electrons arw supplied by one atom