An atom with atomic number 20 is most likely | vedclass

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(C) The electronic configuration of the atom with atomic number $20$ is $2, 8, 8, 2$. It has $2$ valence electrons and tends to lose them to achieve a

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$16$

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(C) The electronic configuration of the atom with atomic number $20$ is $2, 8, 8, 2$. It has $2$ valence electrons and tends to lose them to achieve a stable noble gas configuration,forming a cation with a charge of $+2$.An atom with atomic number $16$ has the electronic configuration $2, 8, 6$. It has $6$ valence electrons and requires $2$ more electrons to complete its octet,forming an anion with a charge of $-2$.Since the atom with atomic number $20$ can donate $2$ electrons and the atom with atomic number $16$ can accept $2$ electrons,they will combine to form an ionic compound (e.g.,$CaS$).Therefore,the atom with atomic number $20$ is most likely to combine with the atom having atomic number $16$.

An atom with atomic number $20$ is most likely to combine chemically with the atom whose atomic number is

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