Question

The long form periodic table consists of ________ groups and ________ periods.

• A. $18$
• B. $7$

Answer 1

The long form periodic table consists of $18$ groups and $7$periods.

• The long form periodic table is also known as the Modern Periodic Table and is based on the Modern Periodic Law.
• The elements are arranged in the increasing order of atomic numbers.
• It is made up of $7$ horizontal periods and $18$ vertical groups.