S1.3 Electron configurations Quiz
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5 questions, one answer each
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1. Which element has the highest first ionisation energy in period 3?
- A. Sodium
- B. Phosphorus
- C. Chlorine
- D. Argon
2. An element's successive IEs (kJ mol⁻¹) are 496, 4562, 6910, 9543. Which group is it in?
- A. Group 1
- B. Group 2
- C. Group 13
- D. Group 14
3. Which pair shows a decrease in first IE from the first element to the second?
- A. Na → Mg
- B. N → O
- C. Si → P
- D. C → N
4. The convergence limit of hydrogen's UV series has frequency 3.29 × 10¹⁵ Hz. What is the energy per atom?
- A. 2.18 × 10⁻¹⁸ J
- B. 1.31 × 10³ J
- C. 4.96 × 10⁴⁸ J
- D. 9.12 × 10⁻⁸ J
5. What is the configuration of Mn²⁺ (Z = 25)?
- A. [Ar]4s²3d³
- B. [Ar]3d⁵
- C. [Ar]4s¹3d⁴
- D. [Ar]4s²3d⁵