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The periodic table of Mendeleev has 18 groups and 7 periods.
The modern periodic table has seven periods.
7The periodic table has 7 periods and 18 groups.
there are 7 periods in the periodic table118
there are 7 periods in the periodic table118
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.
The elements are listed in the order of how many atoms they have. For example, hydrogen is the first element on the periodic table. Hydrogen is the smallest element, and has one atom.
There are 7 periods in the modern periodic table.
Th horizontal rows are referred as periods. There are 7 periods in Periodic Table.