4.2 Write Lewis dot symbols for atoms of the following elements :
(b) ,
The Lewis dot symbol of Na atom is;
As there is only one valence electron in Na atom of Na.
Hence, the Lewis dot structure is .
CBSE Class 12 board exams 2025 to have 50% competency-based questions; no change in 10th
CBSE Class 12 board exams 2024 over; expected result date, trends of last 10 years
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