Which pair of elements belongs to same group
Elements with atomic No. 17 and 28
Elements with atomic No. 20 and 40
Elements with atomic No. 17 and 53
Elements with atomic No. 11 and 33
Modern periodic law -
The physical and chemical properties of elements are periodic functions of their atomic number.
-
Atomic number 17: Chlorine
Atomic number 53: Iodine
Clearly they both belongs to the same group called halogen
Option 1)
Elements with atomic No. 17 and 28
Incorrect
Option 2)
Elements with atomic No. 20 and 40
Incorrect
Option 3)
Elements with atomic No. 17 and 53
Correct
Option 4)
Elements with atomic No. 11 and 33
Incorrect