header row
header row
A horizontal row on the periodic table of elements is called a period.
This is where the name of the table comes from. A horizontal row of elements is called a period. A vertical column is a group.
The horizontal rows in the periodic table are called periods
a horizontal row is called a period.a vertical row is called a group
A row in the periodic table is called a period. Columns are groups.
A row in the Periodic Table is called a period. Columns are groups.
A row in the Periodic Table is called a period. Columns are groups.
header row
header row
a horizontal row is called a period.a vertical row is called a group
The horizontal row on the periodic table is called the "period". The vertical column is called the "group".
groupsi
A horizontal row on the periodic table of elements is called a period.
period
A period is a row of elements on the periodic table.