Chemistry B - covalent, ionic and metallic bonding

Question 1

covalent bond formation

Answer 1

formed by the sharing of a pair of electrons between atoms on the outer shell

Question 2

reasons for / and properties of covalent bonds

Answer 2

little attraction and weak intermolecular forces between molecules due to electrons being shared leading to low melting and boiling points.

Question 3

Diamond structure

Answer 3

each carbon atom forms four covalent bonds with four other carbon atoms.
rigid giant lattice structure.

Question 4

Diamond properties

Answer 4

High melting and boiling point as you have to break strong bonds to make diamond free enough at act as a liquid or gas.
Covalent bonds provide a rigid lattice structure.

Question 5

ionic bond formation

Answer 5

formed by electrostatic forces between positively and negatively charged ions in a chemical compound

Question 6

reasons for / and properties of ionic compounds

Answer 6

high melting point due to giant 3D lattice structure with strong electrostatic forces that require a lot of energy to overcome.

Conduct electricity by molten ionic compounds due to free-floating ions

Question 7

Metallic bonds formation

Answer 7

strong electrostatic attraction between positive metal ions and delocalised electrons

Question 8

reasons for / and properties of metallic compounds

Answer 8

Strong electrostatic forces and strong bonds so metals can maintain a regular lattice structure.
Good conductors of heat / electricity as delocalised electrons are free to move.