State the valencies of the following elements : magnesium and sodium.

Which of the following has magnesium ?

Which of the following is true for magnesium?

Find out the valencies of first 20 elements.

Classify the following into elements, compounds and mixtures. Sodium

Which one of the following elements occur in free state

Which of the following is not an ore of magnesium ?

What is the valence of IIIA group elements ? How can you say ?

The valence shell of transition element consists of

What is the valency of an element with Z= 15 ?

Observe the following periodic table : Arrange the following elements XYZ in increasing order of their valencies :