Question

In the modern periodic table calcium is surrounded by elements with atomic numbers 12 19 21 and 38 which of these physical and chemical properties dissembling calcium

Answer 1

chemical properties of an element are same in a group..so when you'll arange them you'll see that element 12 20(calcium) and 38 lies in the same group so they have same properties and element 19 and 21 will have dissimilar properties with calcium

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).