Question

A particular atom has a total proton charge of 1.12 x 10(-18) c. what element is it?

Answer 1

The total proton charge means the charge of proton multiply by the total number of protons. As we know a charge on proton in Coulombs is,

Charge on Proton  =  1.602 × 10⁻¹⁹ C

Now, number of protons from total proton charge is calculated as,

              As Total proton Charge =  1.602 × 10⁻¹⁹ C × # of Protons

Or,

                # of Protons  =  Total Proton Charge ÷ 1.602 × 10⁻¹⁹ C

Putting Values,

                   # of Protons  = 1.12 × 10⁻¹⁸ C ÷ 1.602 × 10⁻¹⁹ C

                 # of Protons  =  6.99 ≈ 7

Result:
          Total Number of Protons are 7, so The element is Nitrogen as Number of Protons show Atomic Number and Atomic Number of Nitrogen is 7.