Question

state modern periodic law. How many groups
and periods are present in the long form
of the periodic table
.​

Answer 1

Answer:

6 groups are present in the periodic

Answer 2

Explanation:

18 groups

The vertical columns of the periodic table are called the groups and the elements of the same group share similar properties. The horizontal rows are called the periods. Different periods have different principal quantum numbers for the valence shell. There are 18 groups and 7 periods in the modern periodic table.