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.
CBSE Class 10 board exams twice a year ‘relief’ or ‘burden’? Parents, schools share mixed views
CBSE Class 10 exams twice a year from 2026; 64.4% students in favor, second attempt optional
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