R

Ravi Chauhan • 11.26K Points
Tutor II 

Q. The arrangement of elements in the Modem Periodic Table is based on their

  • (A) increasing atomic mass in the period
  • (B) increasing atomic number in the horizontal rows
  • (C) increasing atomic number in the vertical columns
  • (D) increasing atomic mass in the group
Correct Answer - Option (B)
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