Multiple choice general knowledge science & technology

The rows of the periodic table are called:

  1. Lines

  2. Rows

  3. Periods

  4. Symbols

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C Correct answer
Explanation

The horizontal rows in the periodic table are called 'periods'. There are 7 periods in the modern periodic table. Elements in the same period have the same number of electron shells, which is why properties change gradually as you move across a period. The vertical columns are called 'groups' or 'families'.