The third period contains only eight elements even through the electron capacity of the third shell is 18. Write scientific reasons for it.
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Third period contains only 8 elements in spite of the presence of eighteen electrons. Presence of so many electrons leads to the formation of third shell containing 8 electrons in the octet mix.
Period number is indicated by the valence electrons that enter into the eclectic mix.
They fill up the 3s and 3p sub shells before they start populating the 4s orbital. Hence it can be said that the third period contains only 8 elements.
Period number is indicated by the valence electrons that enter into the eclectic mix.
They fill up the 3s and 3p sub shells before they start populating the 4s orbital. Hence it can be said that the third period contains only 8 elements.
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