How many elements are in modern periodic table...? Mcqs

✅ Correct Answer: 118

✅ Correct Answer: Group

✅ Correct Answer: 18

✅ Correct Answer: Long period

✅ Correct Answer: Groups

✅ Correct Answer: Period

✅ Correct Answer: 18

✅ Correct Answer: 7

✅ Correct Answer: Proton

✅ Correct Answer: Mercury and Bromine

✅ Correct Answer: Helium

✅ Correct Answer: Atomic Number

✅ Correct Answer: J

✅ Correct Answer: Periods

✅ Correct Answer: 7

✅ Correct Answer: 18 columns and 7 rows

✅ Correct Answer: Hydrogen

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