3 week assessment - TTT

Question 1

covalent bond

Answer 1

shared pair of electrons

Question 2

Bonding in a metal

Answer 2

Electrostatic attraction between delocalised electrons and positive ions

Question 3

Polar bond

Answer 3

Covelant bond where one of the atoms has a partial negative charge and the other a partial positive charge

Question 4

Electronegativity

Answer 4

The ability of an atom to attract a pair of electrons in a covelant bond

Question 5

Atoms are more electronegative when..

Answer 5

• they contain more protons
• they have a smaller atomic radius

Question 6

Atoms with a smaller atomic radius are..

Answer 6

• towards the right of the periodic table
  -higher up the group

Question 7

Dipole

Answer 7

Exist when there is a positive / negative end

Question 8

Polar molecule

Answer 8

A molecule with clear single S+ end and a clear single S- end

Question 9

Dative covalent bonding

Answer 9

Contains a shared pair of electrons with both electrons supplied by one atom

Question 10

Iconic properties

Answer 10

The greater the charge on the ions the stronger the ionic bonding
The smaller the ions the stronger the ionic bonding (bigger down group)

Question 11

Monoatomic

Answer 11

Group 0 atom
Low melting and boiling point (weak intermolecular forces)
Insoluble and insulator

Question 12

Simple molecular

Answer 12

Non metal with a non metal
Covenant bond
Low melting and boiling point (weak forces)
Insulator, mostly insoluble

Question 13

Giant covalent

Answer 13

Two none metals
Covalent bond
High melting and boiling point ( strong covalent bond)
Most cannot conduct electricity (graphite)
Insoluble

Question 14

Ionic

Answer 14

Metal and a none metal
Ionic bonds
Lattice structure of a positive and negative ions
High melting and boiling point (strong electrostatic attraction between pos + neg ions)
Can conduct when liquid
Soluble

Question 15

Metallic

Answer 15

Metals
Lattice structure
Metallic bonds
High melting and boiling point (strong electrostatic attraction between ions and delocalised electrons)
Can conduct
Insoluble

Question 16

Solubility in water

Answer 16

Water molecules are polar (have hydrogen bonds)
Attractions form between polar water molecules and ions
Compounds with hydrogen usually dissolve in water

Question 17

Solubility in alkanes

Answer 17

Alkanes are non polar (weak forces between molecules)
Non polar substances dissolve
Intermolecular forces between solvent + solute molecules