Question
| Column I | Column II |
| (1) Noble gas | (a) 18 elements |
| (2) First period | (b) Eight elements |
| (3 ) Second period | (c) Two elements |
| (4) 3rd period | (d) Helium |
| (e) Six electrons in the last orbit |
✓
Answer
(1) Noble gas – Helium
(2) First period – Two elements
(3) Second period – Eight elements
(4) $3^{rd}$ period – 18 elements.
(2) First period – Two elements
(3) Second period – Eight elements
(4) $3^{rd}$ period – 18 elements.
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