1. What are three characteristics that ionic compounds have (when in a giant ionic structure)?
- conduct electricity when molten or dissolved, have high boiling points, dissolve in water
- high boiling point, always conducts electricity and cannot dissolve in water
- dissolve in water, low boiling point, can not conduct electricity
- always conducts electricity, low boiling point, cannot dissolve in water
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2. What is the definition of the first ionisation energy?
- the energy needed to remove 1 electron from each atom in 1 mole of gaseous atoms to form one mole of gaseous 1+ ions.
- the energy needed to remove 1 electron from each ion in 1 mole of gaseous 1+ ions to form one mole of gaseous 2+ ions.
- a high attraction between the electron and the nucleus
- the ability to remove all the electrons from the outer shell in an exothermic process
3. What is a covalent bond?
- 1 shared electron
- the electrostatic attraction between ions with the same charge
- a shared pair of electrons
- the electrostatic attraction between two oppositely charged ions
4. What affects ionisation energy?
- nuclear charge, distance from nucleus and sheilding
- distance from the nucleus, shielding and intermolecular forces
- only nuclear charge
- the shape and size of an atom
5. What is the equation for the second ionisation of oxygen?
- O+ (l) -> O2+ (g) + e- (s)
- O+ (g) -> O2+ (g) + e-
- O2- (g) -> O2+ (g) + H2O
- O2+ (g) -> O3+ (g) + e-