In the modern periodic table, the element calcium (atomic number = 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these elements has physical and chemical properties resembling those of calcium and why?

Ca has Atomic number = 20.
Electronic configuration is: 2,8,8,2.
The physical and chemical properties of elements with atomic numbers 12 and 38 will resemble those of calcium because they belong to the second group and all of them have two electrons in the valence shell.

Updated on: 10-Oct-2022

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