Question

. What do the configurations of H, Li, Na, K have in common? Be, Mg, Ca?...

. What do the configurations of H, Li, Na, K have in common?

Be, Mg, Ca?

B, Al?

C, Si?

N, P?

O, S?

F, Cl?

Ne, Ar?

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Answer #1

Ans :

The electron configurations of the elements or ions represent the arrangement of electrons in the shells of the atoms.

So here , the common feature in electron configurations are :

H , Li , Na , K : all have one electron in outermost shell. (ns1)

Be , Mg , Ca : All have two electrons in outermost shell (ns2)

B , Al : both have three electrons in outermost shell. (ns2 np1)

N , P : both have five electrons in outermost shell ( ns2 np3)

O ,S : both have six electrons in outermost shell ( ns2 np4)

F , Cl :  both have seven electrons in outermost shell (ns2 np5)

Ne , Ar :  both have eight electrons in outermost shell (ns2 np6)

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