Question

From the symbol ₁₉K⁴⁰. write the following
1.mass number of Potassium
2.atomic number of Potassium
3.Write the distribution of electrons in an atom of Potassium.

Answer 1

1. 40
2. 19
3. 2,8,8,1

Answer 2

mass no = 40

atomic no = 20

Configuration = 2,8,2