Question

define groups and period
​

Answer 1

Explanation:

All the different elements are arranged in a chart called the periodic table. the horizontal rows are called periods. ... the vertical columns are called groups. elements in the same group are similar to each other.

Answer 2

❤ $\sf\underline\green{ Groups }$ :- The vertical columns in the periodic table is called as group.

❤ $\sf\underline\blue{ Periods }$ :- The horizontal rows in the periodic table are called periods.