SaraNextGen.Com


The atomic mass of an element is 19. The second shell of its atom contain 7 electrons. The number of protons in its nucleus is

(a)

9

(b)

10

(c)

7

(d)

12


Question ID - 103739 | Toppr Answer

The atomic mass of an element is 19. The second shell of its atom contain 7 electrons. The number of protons in its nucleus is

(a)

9

(b)

10

(c)

7

(d)

12

1 Answer - 5876 Votes

3537

Answer Key : (a) -

9



SaraNextGen