It s called a period :)
Horizontal rows are called periods.
A row on the Periodic Table is called a 'period'. There are 7 periods in the periodic table.
Reference: http://en.wikipedia.org/wiki/Periodic_table
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.
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.
Horizontal row in a periodic table is called Period.There are seven periods in a periodic table.All elements in a row have same number of electronic shells.
period
periods
Period
Group.