tthere ordered by numbers
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.
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
The rows of the periodic table are known as periods.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
The horizontal rows on the periodic table are called periods.
There are 7 periods in the modern periodic table.
The horizontal rows on the periodic table are periods. Groups are the vertical columns on the periodic table.
rows. the vertical columns are called periods
The horizontal rows on the periodic table are called periods.
They are the horizontal rows in the periodic table
The periodic table has 7 rows and 32 columns.
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
The rows (Horizontal) are called Periods and the Columms (Vertical) are called Groups.
The rows of the periodic table are known as periods.
Horizontal rows on the Periodic Table of Chemical Elements are called periods.