How does the number of valence electrons vary on moving from left or right in the first period of the periodic table?
In the first period of the periodic table, the number of valence electrons increases from 1 to 2, on moving from left to right.
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Solution How Does the Number of Valence Electrons Vary on Moving from Left Or Right In the First Period of the Periodic Table? Concept: Position of Elements and Trends in the Modern Periodic Table.