The correct answer is 18 Groups and 7 Periods.
- Modern Periodic Table has 18 Groups and 7 Periods.
- It has 118 Elements.
- Each of the tables has a vertical row is called groups. Elements in groups have similar chemical and physical properties because they have the same number of outer electrons.
- Each of the tables has horizontal rows is called periods. During a period, a gradual change in chemical properties occurs from one element to another.
- It was given by Dmitri Mendeleev.
- The Structure of it is like a bird Grid.
- The Modern Periodic table is used to organize all the known elements.
- Advantages of Modern Periodic Table:-
- It is easier to remember the properties of an element if its position in the periodic table is known.
- It made the study of Chemistry Systematic and Easy.
Modern Periodic Table:-



