Question

What is valency? Explain it with reference to period 3 of Modern periodic table​

Answer 1

Answer:

Hydrogen-H

Helium-He

Lithium-Li

Beryllium-Be

Boron-B

Carbon-C

Nitrogen-N

Oxygen-O

Fluorine-F

Neon-Ne

Sodium-Na

Magnesium-Mg

Aluminium-Al

Silicon-Si

Phosphorus-P

Sulphur-S

Chlorine-Cl

Argon-Ar

Potassium-K

Calcium-Ca

Explanation:

Valency is the ability of an atom to gain or lose electron in order to achieve the noble gas configuration. It refers to the ability of an element to combine with other element. It is obtained by determining the number of electrons in the outermost shell (also called valence shell) of each atom of an element.