The rows of Mendeleev’s periodic table are called what
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The elements are arranged in a series of rows called “periods,” so that those with similar properties appear in vertical columns. Each vertical column is called a “group,” or family, of elements.
The elements are arranged in a series of rows called “periods,” so that those with similar properties appear in vertical columns. Each vertical column is called a “group,” or family, of elements.
Answer:
Periods.
Step-by-step explanation: