a horizontal row is called a period.a vertical row is called a group
An elements period is its row in the Periodic Table.
An elements period is its row in the Periodic Table.
In a periodic table a row is a period.
groupsi
Period 3 is the 3rd horizontal row. It is the 3rd row in periodic table.
The period is the horizontal row.
period
It is a period.
A period on the periodic table refers to a row of elements that are arranged in order of increasing atomic number. Each period starts a new row and represents the number of electron shells an element has.
A period is a horizontal row.
A horizontal row on the periodic table of elements is called a period.
A row in the periodic table is called a period. Columns are groups.