Question

Which pair of atomic numbers represent elements in the same group 6,12. 4,16. 11,19. 8,7

Answer 1

Answer:

11,19

Explanation:

Atomic number 11 is Sodium(Na)

Atomic number 19 is Potassium (K)

Both of these belong to first group(Alkali metals)

Answer 2

Answer:

11 , 19 have same atomic number