Question

An element Barium has atomic number 56. Look up its position in the periodic table and answer the following questions.

(iii) What is its valency?

Answer 1

• The element Ba (56) belongs to group 2 which is known as alkaline earth metal.
• Ba being a group 2 element has 2 electrons in its valence shell. It readily loses its 2 valence electrons and forms a positive ion to gain stability. Therefore, its valency is 2.