Ionic bonding and ionic lattices Quiz
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5 questions, one answer each
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1. Which observation is evidence for the existence of ions?
- A. A solid has a high melting point and does not conduct
- B. A coloured species moves towards one electrode on damp filter paper
- C. A compound dissolves in water
- D. A solid is soft and easily scratched
2. Which ion has the smallest radius?
- A. O²⁻
- B. F⁻
- C. Mg²⁺
- D. Na⁺
3. Why does lithium fluoride have a higher melting point than potassium bromide?
- A. Li⁺ and F⁻ are smaller, so the electrostatic attraction is stronger
- B. Li⁺ and F⁻ have greater charges
- C. Lithium fluoride has covalent bonds
- D. Potassium bromide has fewer ions
4. Which is the best description of ionic bonding?
- A. Sharing of electron pairs between atoms
- B. Attraction between positive ions and delocalised electrons
- C. Strong net electrostatic attraction between oppositely charged ions
- D. Transfer of electrons from a metal to a non-metal
5. A sample of an ionic solid is molten and conducts, but the solid does not. Which explains this?
- A. Electrons become free to move on melting
- B. The ions become free to move on melting
- C. Covalent bonds break on melting
- D. The ions disappear on melting