According to Mendeleev’s periodic table, the vertical columns and horizontal rows are respectively called as:
A
Rows and periods
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B
Groups and rows
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C
Groups and periods
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D
Periods and groups
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Solution
The correct option is C Groups and periods According to Mendeleev’s periodic table, the vertical columns are called as groups and horizontal rows are called as periods. It has 8 groups and 6 periods in total.