Question

why we need periodic table with example​

Answer 1

Answer:

The table can be used to predict the properties of elements, even those that have not yet been discovered. Columns (groups) and rows (periods) indicate elements that share similar characteristics. The table makes trends in element properties apparent and easy to understand.

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

Ex : Lithium n' Sodium show same chemical property..

Both have same valence electrons,i.e. 1

Explanation:

It may be helpful.