the horizontal lines are called periods and the vertical lines are called groups.
horizontal rows are called as periods
there are 7 periods in that.
caution:- the lanthanides and actinides rows (which are kept separate from the Periodic Table) are not counted in no. of periods
Periods - They are each designated by number, from top to bottom starting with one (1) [i.e. period #1 includes Hydrogen (H) & Helium (He), and so fourth]
The Horizontal row on the table is called a period
a table formatted with horizontal lines is called
The horizontal rows of the periodic table are called Periods and the vertical rows are called groups.
A period is a row of elements on the periodic table.
These horizontal rows are called periods.
The horizontal rows are known as periods.
a table formatted with horizontal lines is called
The horizontal rows of the periodic table are called Periods and the vertical rows are called groups.
Groups are the verticals and periods are the horizontal lines
The Horizontal row on the table is called a period
each row in the Periodic Table is called a period.
The horizontal rows in the periodic table are called periods
The horizontal row is called period.
A period is a row of elements on the periodic table.
A horizontal series of cells in a table is usually called a "row". A vertical series of cells in a table is usually called a "column".
periodsThere are seven periods, or rows, on the periodic table.
A horizontal row on the periodic table of elements is called a period.
The horizontal rows are called periods