Periods are the elements on the Periodic Table that go across, in rows.
So basically going across each row is called a period
they are called groups
The two names for horizontal rows on the periodic table are periods and series.
The Periodic Table has 18 groups and 7 periods.
The rows of the periodic table are known as periods.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
Periods have same shells. There are 7 periods in periodic table.
The two names for horizontal rows on the periodic table are periods and series.
The Periodic Table has 18 groups and 7 periods.
The rows of the periodic table are known as periods.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
Periods have same shells. There are 7 periods in periodic table.
The Periods are the horizontal rows on the periodic table.
The periodic table has 7 periods on it.
rows. the vertical columns are called periods
The horizontal rows on the periodic table are periods.
Periods are placed horizontally in the periodic table of Mendeleev.
The modern periodic table has seven periods.
The horizontal rows on the periodic table are periods. Groups are the vertical columns on the periodic table.