Question

hey guys please answer this,

Question:1
(i) What is the similarity in the electron configuration of lithium, potassium and sodium.
(ii) Which element is the most reactive from above (i) and Why?

Answer 1

(i) The similarities between Lithium , Sodium and Potassium is that all the 3 metals have 1 electron in their outermost orbital.

(ii) From above Potassium is most reactive because
Li - 1s²2s¹ - Is a stable electronic configuration since primary's' orbital is partially
filled.

Na - 1s²2s²2p6 3s¹ - Outermost orbital is less stable due to less nuclear charge and more shielding energy.

K - 1s²2s²2p6 3s²3p6 4s¹ - Even lesser nuclear charge and more shielding energy.







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