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 groupAnswer
Answer:B
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 groupAnswer