Question

Table and group of model period table

Answer 1

Answer:

Explanation:

No of groups = 18

No of periods = 7

Answer 2

Answer:

In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns (between groups 3 and 4) are not numbered. ... Groups may also be identified using their topmost element, or have a specific name.