Question

how does the element atomic radius of elements change going first from left to right in a periodic and second draw down a group in the modern periodic table given reason in support your answer​

Answer 1

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HERE IS YOUR ANSWER,

Atomic radii decreases when we move from left to right across periodic table that is when we move left to right in a period because the number of valence electrons increases and the attraction between electron and the nucleous increases hence the shell shrinks towards the nucleous.

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