MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
In which group of the periodic table is the element in the passage?
Think it through first, then pick an option.
- a 1
- b 2
- c 11
- d 12
Answer and explanation
Correct answer: c 11
29 is Cu: 3d¹⁰4s¹, 10 + 1 = 11.
Why the other options are wrong
- a 1: Group 1 has s¹ alone; here d¹⁰ also sits before it. The answer is 11.
- b 2: Group 2 needs ns². The answer is 11: 29 is Cu: 3d¹⁰4s¹, 10 + 1 = 11.
- d 12: Group 12 needs 3d¹⁰4s² (Zn, 30). The answer is 11.
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