there are 7 periods in the periodic table118
The periodic table has 7 periods on it.
The modern periodic table has seven periods.
7The periodic table has 7 periods and 18 groups.
Horizontal rows are termed as periods. There are 7 periods in periodic table.
There are 7 periods in the modern periodic table.
Periods are the horizontal rows in the periodic table of Mendeleev; this table contain 7 periods.
There are 7 periods in the modern periodic table.
7 periods and 18 groups are there on the modern periodic table.
7The Periodic Table has 7 periods and 18 groups.
The rows in the periodic table are called periods. There are 7 periods in periodic table.
There are a total of 18 groups on The Periodic Table of Elements.
Periods have same shells. There are 7 periods in periodic table.