MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
Which element has the lowest ionization energy?
Think it through first, then pick an option.
- a Li
- b F
- c Na
- d Cl
Answer and explanation
Correct answer: c Na
Na is at the left of period 3 and below Li, the largest.
Why the other options are wrong
- a Li: Li is above Na in group 1, so higher. The answer is Na.
- b F: F is at the right of period 2, the highest. The answer is Na.
- d Cl: Cl is at the right of period 3, high. The answer is Na.
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