Question

The atomic number of an element is 5 and mass number is 11. Find the number of electrons, protons and neutrons present in an atom of it. How can this element be represented?

Answer 1

Number of electrons (Z = 5) = 5
Number of protons (Z = 5) = 5
Number of neutrons (A = Z) = 11 – 5 = 6
Since the atomic number is 5, the element is boron and is represented as ₅B¹¹