It is called an Ellipsis and looks like this ...
It is called an Ellipsis.
each row in the Periodic Table is called a period.
vertically they're called groups and horizontally periods
A row of elements is known as a Period, while a column is known as a group, or family.
The horizontal rows in the periodic table are called periods
The properties of elements reoccur as the rows are repeated. Thus, the rows are called periods because each row results in a repetition.
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
periods
The horizontal rows are called periods
each row in the Periodic Table is called a period.
vertically they're called groups and horizontally periods
The horizontal rows of the periodic table are called Periods and the vertical rows are called groups.
the period
A horizontal row is called a period .
The time periods are called quarters and there are four of them.
The rows are called periods. And the columns are called groups.
A row of elements is known as a Period, while a column is known as a group, or family.