Question

The modern periodic table is divided into how many blocks?

Answer 1

Modern periodic table:

• “The physical and chemical properties of the elements are periodic functions of their atomic numbers”
• The horizontal rows are called periods while the vertical columns are known as groups.
• There is a total of seven periods. The period number is the highest principal quantum number (n) of the elements in the period.
• It consists of $18$ groups.
• The modern periodic table is subdivided into four blocks:

1. s-block- Group $1$ and Group $2$ are s-block elements.
2. p-block- The elements from Group $13$ to Group $18$ are p-block elements.
3. d-block- The transition metals that lie in Group $3$ to Group $12$ are d-block elements.
4. f-block- The inner transition elements are f-block elements.