Question

What is meant by atomic size? Why does atomic size decrease
across a period.

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Answer 1

For an isolated atom, atomic size is the distance between the centre of the nucleus of the atom to its outermost shell. Atomic size decreases across the period as the number of valence electrons increases and the effective nuclear also increases

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Answer 2

Answer:

asslamalikum sis

good morning

haan exam postpone hogaye shyad July 12 say hy...?