An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a Compound. i]Write the position of these elements in the Modern Periodic Table ii] Which one is a metal and which one is a non-metal? iii] Write the formula of the compound.

An element X (atomic number 17) reacts with an element Y (atomic numbe

1.	An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a Compound. i]Write the position of these elements in the Modern Periodic Table ii] Which one is a metal and which one is a non-metal? iii] Write the formula of the compound.
Answer» Solution :Electronic CONFIGURATIONS are: `X (17) to 2, 8, 7 and Y (20) to 2, 8, 8, 2. 1` i] X belongs to group 17 and period 3. Y belongs to group 2 and period 4. ii] Y is a metal and X is a non-metal. III] YX, is the formula of the compound formed by them SINCE valency of X is ONE and Y is two.