How many rows and columns are in the modern Periodic Table?
Correct answer: A. 18 columns and 7 rows
- A. 18 columns and 7 rows
- B. 12 columns and 9 rows
- C. 7 columns and 18 rows
- D. 25 columns and 15 rows
Explanation
The modern periodic table has 18 vertical columns called groups and 7 horizontal rows called periods. Thus the correct arrangement is 18 columns and 7 rows.
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