Question

Define periodic classification.​

Answer 1

Answer:

Periodic Classification of Elements – Present form of periodic table. Based on the modern periodic law, the elements are arranged into rows and columns based on their atomic number. There are 18 columns, called groups and 7 rows, called periods. ... Thus elements in a group have similar properties.

Answer 2

$\huge \text{Answer:}$

Periodic Classification of Elements – Present form of periodic table. Based on the modern periodic law, the elements are arranged into rows and columns based on their atomic number. There are 18 columns, called groups and 7 rows, called periods. ... Thus elements in a group have similar properties.