58-ni has an atomic number of 28 which are the protons and a mass number of 58. since the mass number is 58 this is the protons and neutrons. 58- 28 equals 30 neutrons. protons equal electrons in a normal atom so 28 protons then there is 28 electrons.

60-ni +2 will have the same number of protons as the normal atom of ni so it has 28 protons and it lost two electrons due to the + charge. so it will have 28 regular protons because it is still nickel, 26 electrons since it lost 2 giving it a positive charge but it had to gain 2 neutrons by the loss of electrons, resulting in 32 neutrons.

28 regular protons
26 electrons due to loss
32 neutrons due to gain by loss of electrons to keep peace in atm

Explanation: Nickel is element number 28 on the period table with a mass number 58 or 60, it exist in two forms and the phenomenon is known as isotopy

Definition of Isotopy is simply a phenomenon whereby elements exist in various forms that have the exact same chemical properties but different atomic mass.

58-Ni has atomic number 28 because that's the number o the element on the periodic table. Proton number is the same as atomic number and same as electron number for a neutral element or element without charge.

Mass number = Proton number (P) + Neutron number (N)

58 = 28 + N

N= 58-28

N= 30

58-Ni has 28 has the atomic number, proton number and electron number because it is a neutral atom but the neutron is 30 as shown in the calculation above.

60-NI+2 has a contrasting figure because the element has a charge of +2

Mass number= Proton + Neutron

60 = 28 + N

N= 60 - 28

N= 32

Electron = Proton - Charge

                 28 - (+2)

                  28 - 2

Electron = 26

The number of electron in 60-Ni +2 differs from 58-Ni because of the number of charge

Electron number differs from proton number in any element with a charge.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

it is the most commonly accepted one