ionic, covalent, mettalic bonding

Question 1

ionic bond

Answer 1

the strong electrostatic attraction between two oppositely charged ions

Question 2

lattice

Answer 2

regular structure

Question 3

describe the structure of ionic compounds

Answer 3

ionic compounds form giant lattices

each ion is electrostatically attracted in all directions to ions of the opposite charge

Question 4

physical properties of an ionic compound

Answer 4

High melting point
Brittleness
Solubility in water
Electricity conductivity when molten or aqueous

Question 5

why do ionic compounds have high melting points

Answer 5

they have strong electrostatic forces of attraction that require lots of energy to break

Question 6

polyatomic ions

Answer 6

groups of 2 or more atoms which have become charged

Question 7

why do covalent bonds have weak melting points

Answer 7

they have weak intermolecular forces of attraction which are easy to break

Question 8

why is lots of energy required to break covalent bonds

Answer 8

they make giant covalent structures

Question 9

describe a Metallic bond

Answer 9

form giant structures in which electrons in the outer shells of the metal atoms are free to move

they are strong, so metals can maintain a regular structure and usually have high melting and boiling points.

Question 10

properties of metals

Answer 10

• giant lattice structures
• There are layers of positive metal ions surrounded by a sea of delocalised electrons
• electrical conductivity
• insoluble
• thermal conductivity
• malleability (bend when heated)

Question 11

what is a metallic bond

Answer 11

Metallic bonding is the electrostatic force of attraction between the nuclei of the positive metal ions and the delocalised electrons