Chemistry, asked by manasamishra569, 4 hours ago

if size increases down the group then why there is maximum difference of atomic size between sodium and potacium

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Answered by afifa23june

Answer:

As an example, potassium (K) has a larger average atomic radius (220 pm)than sodium (Na) does (180 pm). The potassium atom has an extra electron shell compared to the sodium atom, which means its valence electrons are further from the nucleus, giving potassium a larger atomic radius.

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