Periods are the horizontal rows
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.
rows. the vertical columns are called periods
Periods are placed horizontally in the periodic table of Mendeleev.
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.
The modern periodic table has seven periods.
Periods are placed horizontally in the periodic table of Mendeleev.
The horizontal rows on the periodic table are periods. Groups are the vertical columns on the periodic table.
there are 7 periods in the periodic table118
Periods are horizontal rows. 7 periods are present in modern periodic table.