Question

Write a short note on structure of the modern periodic table.

Answer 1

Structure of the modern periodic table:

• The modern periodic table contains horizontal periods 1 to 7.
• Similarly, it has vertical groups 1 to 18.
• Atomic numbers are indicated on the upper part of the element. Two rows are separately placed at the bottom of the periodic table.
• These are called lanthanide series and actinoid series.
• There are 118 boxes in the periodic table.
• The whole periodic table is divided into four blocks.
• The left side is the s-block, the right side is a p-block, in the middle there is a d-block and the lanthanide series and actinoid series form the f-block.
• The first period contains 2 elements.
• The s-block contains alkali and alkaline earth metals.
• The p-block contains metals, non-metals, and metalloids.
• The d-block contains transition metals.