Question

please answer it.......................​

Answer 1

Answer:

The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant metal in the earth's crust. The metal is trimorphic, harder than sodium, but softer than aluminium. A well as beryllium and aluminium, and unlike the alkaline metals, it doesn't cause skin-burns

Answer 2

a)yes , calcium is metal

b)yes, calcium is bigger than pottasium in size due to its atomic no.

c)cacl2