Question

In the modern periodic table, the elements 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?(All India - 2011)

Answer 1

Answer:

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Answer 2

The elements with atomic numbers 12 , 38 will have physical and chemical properties resembling those of calcium.

Calcium lies in the second group of the periodic table . The elements with atomic number 12 and 38 also lie in the second group of the periodic table.

The elements in the same group have same valence electrons and thus have similar physical and chemical properties.