In the Modern Periodic Table,calcium (atomic | vedclass

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(A) Calcium $(Ca)$ has an atomic number of $20$ and its electronic configuration is $2, 8, 8, 2$. It belongs to Group $2$ of the periodic table.Elemen

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Elements with atomic numbers $12$ and $38$

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(A) Calcium $(Ca)$ has an atomic number of $20$ and its electronic configuration is $2, 8, 8, 2$. It belongs to Group $2$ of the periodic table.Elements in the same group have the same number of valence electrons and exhibit similar chemical properties.- Atomic number $12$ (Magnesium,$Mg$): Electronic configuration $2, 8, 2$. It has $2$ valence electrons and belongs to Group $2$.- Atomic number $38$ (Strontium,$Sr$): Electronic configuration $2, 8, 18, 8, 2$. It has $2$ valence electrons and belongs to Group $2$.Therefore,elements with atomic numbers $12$ and $38$ have physical and chemical properties resembling calcium.

In the Modern Periodic Table,calcium (atomic number $20$) is surrounded by elements with atomic numbers $12$,$19$,$21$ and $38$. Which of these have physical and chemical properties resembling calcium?

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