Question

[TBQ.VI.(4)]
State any five features of modern periodic table.

Answer 1

• All the elements are arranged in the increasing order of their atomic number
• The horizontal rows are called periods. There are seven periods in the periodic table.
• The elements are placed in periods based on the number of shells in their atoms
• Vertical columns in the periodic table starting from top to bottom are called groups. There are 18 groups in the periodic table
• Based on the physical and chemical properties of elements, they are grouped into various families.