Question

In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with a
tomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resem-
bling calcium?
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Answer 1

Answer:

to see period table answers is now

Answer 2

Answer: The answer is element having atomic number 12 and 38

Explanation:

Ca : 2,8,8,2

The physical and chemical properties of element having atomic number 12 and 38 will resemble with that of Calcium.

This is because of that they belong to the same group i.e. 2nd group and all of them have same valance electron in there outermost shell.

Thus element having atomic number 12 and 38 i.e. Magnesium and Strontium will have the properties resembling to that of Calcium.....

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