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 Date Sheet 2025 (Out) Live: Class 10, 12 board exam time table at cbse.gov.in; syllabus, sample papers
CBSE Class 12 board exam date sheet 2025 out; exams from February 15 to April 4
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