Q. 12. If , what would be the valency of the element? Also, name the element.
Given
the Atomic number, Z = 3
Distribution of electrons :
K = 2,
L = 1 So, Valency = 1 .
The element with atomic number 3 is lithium.
Board Exams 2026: NCERT PARAKH forms expert committee to standardise Class 10, 12 certificates
CBSE Class 10 board exams 2026 from February 17, May 15; tentative date sheet out for both phases
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