Ionisation energies Quiz
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5 questions, one answer each
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1. Which equation represents the second ionisation energy of calcium?
- A. Ca(g) → Ca²⁺(g) + 2e⁻
- B. Ca⁺(g) → Ca²⁺(g) + e⁻
- C. Ca⁺(s) → Ca²⁺(s) + e⁻
- D. Ca²⁺(g) + e⁻ → Ca⁺(g)
2. An element has a large jump between its 4th and 5th ionisation energies. Which group is it in?
- A. Group 5
- B. Group 3
- C. Group 6
- D. Group 4
3. Which factor does NOT cause the first ionisation energy to fall down Group 2?
- A. Increased atomic radius
- B. Increased shielding
- C. Increased nuclear charge
- D. Outer electron further from the nucleus
4. Why is the first ionisation energy of oxygen greater than that of carbon?
- A. Oxygen has a greater nuclear charge with similar shielding
- B. Oxygen has a larger atomic radius
- C. Oxygen has fewer protons
- D. Oxygen has more inner shells
5. Why are successive ionisation energies of an element always larger than the previous one?
- A. The electrons are further from the nucleus
- B. The shielding increases
- C. The electron is removed from an ion that is more positive
- D. The nuclear charge decreases