How many rows and columns are in the modern Periodic Table...? Mcqs

✅ Correct Answer: 18 columns and 7 rows

✅ Correct Answer: The number of protons (atomic number) in the nucleus

✅ Correct Answer: Groups

✅ Correct Answer: Hydrogen

✅ Correct Answer: 18

✅ Correct Answer: Periods

✅ Correct Answer: 7

✅ Correct Answer: 118

✅ Correct Answer: 18

✅ Correct Answer: Mercury and Bromine

✅ Correct Answer: Group