Answer:
The number of neutrons: ¹³C₆ = 7, ⁴¹K₁₉ = 22, ⁸⁰Br₃₅ = 45.
Explanation:
The mass number (A) of an atom is equal to the sum of the atomic number (Z) and the number of neutrons (N).
A= Z + N
Therefore, the number of neutrons, N = A - Z
1. C : A = 13 and Z = 6
The number of neutrons, N = A - Z = 13- 6 = 7 neutrons
2. K : A = 41 and Z = 19
The number of neutrons, N = A - Z = 41 - 19 = 22 neutrons
3.Br : A = 80 and Z = 35
The number of neutrons, N = A - Z = 80 - 35 = 45 neutrons
