An element M is in group 13th of the periodic table, the formula for its oxide is
A. MO
B. M2O3
C. M3O2
D. None of these
Answer:B
An element M is in group 13th of the periodic table, the formula for its oxide is
A. MO B. M2O3 C. M3O2 D. None of these
Explanation: As the element M belongs to group 13th of the periodic table so it has 3 valence electrons, i.e., it can have +3 oxidation state while oxygen atom (with 2 valency) has −2 oxidation state. So the formula for the corresponding oxide is M2O3.