Question

In the modern periodic table , calcium is surroundee by elements with atomic no. 12,19,21,38 . Which of these have physical and chemical properries resembling calcium

Answer 1

12 and 38, same valency

Answer 2

The element with atomic number 12 resembles calcium the most..this is because both have both 2 electrons in the valence shell, which is a key factor in determining the chemical and physical properties of elements.