Question

Question 43 (b)
A element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.
Classify X and Y as metal (s), non-metal (s) or metalloid (s)

Answer 1

X is non metal and this element is called as Chlorine (Cl) . It comes under group 17 and period 3.

Y is a metal and it is called as Calcium (Ca). It comes under group 2 and period 4.