Question

3.
B. A metal M forms an oxide having the formula M203.
It belongs to third period. Write the atomic number
and valency of the metal.​

Answer 1

Answer:

Explanation:An atomic number represents the number of protons in the nucleus and valency number of a metal is defined as the measure of the number of chemical bonds the atoms of a substance can form.

The atomic number of the periodic table for M2O3 is 13 and valency number of the compound is 3.

Hence the metal is aluminum in the periodic table 

if possible mark me as brainliest