Question

An element of atomic weight 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statements regarding this element is not correct

• A. It belongs to II group of the periodic table
• B. It has 20 neutrons
• C. The formula of its oxide is $MO_{2}$
• D. It belongs to 4th period of the periodic table

Answer 1

Answer: (C)

The formula of its oxide is $MO_{2}$

Answer 2

Its valency is 2. So it will form MO type compound.