[" A metal "M" forms an oxide having the formula "M_(2)O_(3)" ."],[" It belongs to third period in the modern periodic table.Write the atomy "],[" number and valency of the metal."]

(a) A metal M forms an oxide having the formula M_(2)O_(3) . It belongs to 3rd period in the modern periodic table. Write the atomic number and valency of the metal. (b) Write the formula of chloride of metal M. (c) What could metal M be?

A metal M forms an oxide having the formula M_2O_3. It belongs to 3rd period in the Modern Periodic table. Write the atomic number and valency of the metal.

Write the total number of periods in modern periodic table.

Metals belonging to the same group in the periodic table are

Metals belonging to the same group in the periodic table are