Periods :P
Periods
columns are the horizantal lines and groups are are the vertical lines
Vertical columns are called groups. Horizontal rows are known as periods.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
rows. the vertical columns are called periods
The horizontal rows on the periodic table are called periods.
Horizontal rows on the Periodic Table of Chemical Elements are called periods.
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
There are 7 periods in the modern periodic table.
Horizontal rows are called groups. Groups are formed according to the atomic number.
The rows on the periodic table are called periods.
The vertical columns in a periodic table are called groups, and the horizontal rows are called periods.