Concept explainers
The number of periods and groups in the periodic table.
Answer to Problem 14RQ
There are seven periods and eighteen groups in a periodic table.
Explanation of Solution
A periodic table is a very systematic format discovered by scientists to study all the existing elements. It is designed so as to keep a glance at once of all elements present till date.
A periodic table has seven horizontal rows where the elements are placed according to their increasing number of electrons and are called periods. And a periodic table has eighteen vertical columns where the elements belonging to similar outer electronic configuration and having similar chemical properties are placed and are called groups.
Thus, there are seven periods and eighteen groups in a periodic table.
Conclusion:
Therefore, there are seven periods and eighteen groups in a periodic table.
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