What is the mass number of an ion with 108 electrons, 157 neutrons, and a +1 charge?

The mass number of the ion is 266

The mass number of an element is simply obtained by calculating the sum of the Proton and Neutron in the nucleus of the atom of the element i.e

To solve the question given above, we'll begin by calculating the number of protons in the ion. This can be obtained as follow:

Electron = 108

Charge = +1

Charge = Proton – Electron

1 = Proton – 108

Collect like terms

1 + 108 = Proton

Finally, we shall determine the mass number of the ion. This can be obtained as follow:

Proton = 109

Neutron = 157

Mass number = Proton + Neutron

Mass number = 109 + 157

Therefore, the mass number of the ion is 266

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