rows. the vertical columns are called periods
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
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.
each row in the Periodic Table is called a period.
The horizontal rows on the periodic table are called periods.
rows. the vertical columns are called periods
The horizontal rows on the periodic table are called periods.
in the periodic table the rows are called periods and the columns are called groups
The horizontal rows are periods on periodic table. There are 7 horizontal rows in modern periodic table.
Horizontal rows on the Periodic Table of Chemical Elements are called periods.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
The horizontal rows of elements in the periodic table are called periods.
The horizontal rows on the periodic table are called periods.
the rows of the Periodic Table are called groups or families and the rows are called periods
each row in the Periodic Table is called a period.
The rows (Horizontal) are called Periods and the Columms (Vertical) are called Groups.