Question

What happened to Zeffctive when we move from left to right in a period ? ?

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Answer 1

Answer:

On moving from left to right in a period, the chemical reactivity of elements first decreases and then increases. On moving from left to right in a period, the number of valence electrons increases from 1 to 8. On moving from left to right in a period, the atomic size decreases; the size of the atoms decreases.

Answer 2

Z effective decrease when we move from left to right