Question

If R is the symbol of an element in the third period and third group of Mendeleev’s periodic table then what is the formula of its oxide?​

Answer 1

Answer:

RO2

Explanation:

Elements place will be R

Answer 2

Explanation:

R is the symbol of an element in the third period of Mendeleev's periodic table then the formula of its oxide is R₂O₃. The elements belonging to the third period have the general electronic configuration as ns²np¹. Hence, they have three valence electrons in their valence shells