There are NO vertical ROWS, because rows run horizontally, and COLUMNS run vertically. There are 18 vertical columns in the Periodic Table.
18 groups
The rows (Horizontal) are called Periods and the Columms (Vertical) are called Groups.
The horizontal rows on the periodic table are periods. Groups are the vertical columns on the periodic table.
The vertical columns in a periodic table are called groups, and the horizontal rows are called periods.
The horizontal rows on the periodic table are called periods.
rows. the vertical columns are called periods
Groups or families are the vertical columns on the periodic table. Periods are the horizontal rows on the Periodic Table.
The horizontal rows on the periodic table are periods. Groups are the vertical columns on the periodic table.
columns
The vertical rows on the periodic table are called groups.The vertical rows are called periods and the horizontal columns are called groups.
The vertical columns in a periodic table are called Groups.
Groups are the vertical columns. Periods are the horizontal rows in the periodic table.