Compounds

Question 1

Ionic compounds

Answer 1

-Regular arrangement of ions (lattice structure)
-High melting point (ions held together by strong electrostatic forces of attraction between ions of opposite charges require lots of energy to break)
-Conduct electricity when molten (ions are free to move)
-ide (contains 2 elements)
-ate (contains at least 3 elements, one of which is oxygen)

Question 2

Covalent compounds

Answer 2

-Strong forces of attraction between atoms
-Weak intermolecular forces of attraction between molecules
-Don’t conduct electricity (no charged particles)
-Low melting and boiling point

Question 3

Metallic compounds

Answer 3

-High melting and boiling points as the electrostatic forces of attraction between + metal ions and - electrons require lots of energy to break
-Conducts electricity (delocalised electrons)

Question 4

Properties of metals

Answer 4

-High melting and boiling points
-High density
-Malleable
-Good conductors of heat and electricity

Question 5

Giant covalent structure - Diamond

Answer 5

-Strong covalent bonds
-Hard
-High melting and boiling points
-Doesn’t conduct electricity (4 covalent bonds to carbon)

Question 6

Giant covalent structure - Graphite

Answer 6

-Strong covalent bonds
-Weak intermolecular forces of attraction between layers
-Soft
-Conducts electricity (3 covalent bonds to carbon)

Question 7

Giant covalent structure - Fullerines

Answer 7

-Strong covalent bonds
-Spherical
-Unreactive (used as catalysts)
-Conducts electricity (layer of delocalised electrons)