1.

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?

Answer»

Solution :The atomic numbers of three elements which lie in the same group are 12, 20 and 38. So, the elementshaving atomic numbers 12 and 38 have PHYSICAL and chemical properties resembling with CALCIUM.


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