the period
a horizontal row is called a period.a vertical row is called a group
A period is a row of elements on the periodic table.
The horizontal rows are called periods
The horizontal rows on the periodic table are called periods.
rows
the period
A horizontal row on the periodic table of elements is called a period.
a horizontal row is called a period.a vertical row is called a group
The vertical "rows" are called Columns, and the horizontal "rows" are called Periods
No. A row is horizontal and a column is vertical.
a horizontal row is called a period.a vertical row is called a group
The horizontal row is called period.
The Horizontal row on the table is called a period
A period is a row of elements on the periodic table.
Rows are horizontal and columns are vertical.
The definition of the word row is usually a fight.