Properties of Elements in Periods and Groups of Periodic Table

Properties of Elements in Periods and Groups

1.Valence electrons: In a period, the number of valence electron increase from 1 to 8 from the left to the right. In a group, the number of valence electrons is the same for all the elements.

2.Valency: In a period, the valency of the element increases from 1 to 4 and then decreases from 4 to 0 from the left to the right. In a group, the valency is the same of all elements.

3.Atomic size: In a period, the atomic size of the element decreases from the left to the right.

In a group, the atomic size of the element increases from top to bottom.

4.Metallic property: In a period, the metallic property of element decreases from the left to the right. In a group, the metallic property of the elements  increases from the top to the bottom.

5.Non-metallic property: In a period, the non metallic property of the element increases from the left to the right. In a group, the non metallic property of the elements decreases from the top to the bottom.

Why is the periodic table important?

To summarise, the periodic table is important because it is organised to provide a great deal of information about elements. The table can be used to predict the properties of elements. Groups and periods indicate elements that share similar characteristics. The table makes trends in elements properties apparent. The table provides important informations used to balance chemical equations.