The modern periodic table is divided into 7 periods and 18 groups. It also comprises elements divided into four blocks namely s,p,d and f.
Features of modern periodic table
The periodic table is an arrangement of all the elements known to man in accordance with their increasing atomic number and recurring chemical properties. They are assorted in a tabular arrangement wherein a row is a period and a column is a group.
- There are eighteen vertical columns known as groups in the modern periodic table which are arranged from left to right and seven horizontal rows which are known as periods.
- The modern periodic table of elements can be broken down into 4 blocks – the s-block, the p-block, the d-block, and the f-block
- The elements of group 1, 2, 13, 14, 15, 16, and 17 are known as the main group elements or normal elements. The elements of groups 3, 4, 5, 6, 7, 8, 9, 11 and 12 are known as the transition elements. Group 18 is called noble gases or inert gases.