Question

Write a short note on groups present in long form of periodic table.

Answer 1

• The vertical columns in the long form of the periodic table are known as groups.
• There are a total of 18 groups, numbered sequentially from 1 to 18 from left to right.
• Elements present in the same group possess the same number of valence electrons.
• Because they have identical outer electronic configurations, all elements in a group show similar chemical properties.
• Group 1 elements are called alkali metals, Group 2 are alkaline earth metals, Group 17 are halogens, and Group 18 are noble gases.
• As you move down any group, the number of electron shells increases successively by one at each step.