Question

In the modern periodic table ca (at no. = 20) is surrounded by elements with atomic number 12, 19, 21, and 38. which of these have physical and chemical properties resembling ca.

Answer 1

12 and 38 are the answer

Answer 2

Explanation:

The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2).