The symbol for the species that contains 28 protons, 30 neutrons, and 26 electrons is:

Question

Quizplus · Accepted Answer

The symbol for an element or species contains the element symbol, which is Ni for nickel, followed by the atomic number, which is the number of protons. The atomic number of the species in question is 28, so the symbol begins with Ni28. Next, we need to indicate the mass number, which is the sum of protons and neutrons. The mass number of the species in question is 28+30=58, so we write Ni58. Finally, we indicate the charge on the species by adding or subtracting electrons. The species in question has 26 electrons, which is two less than the number of protons. This means it has a charge of 2+, which we indicate by adding (2+) after the element symbol and mass number. Putting it all together, we get Ni58²⁺. Therefore, the correct choice is D, which is Ni58²⁺.

The Symbol for the Species That Contains 28 Protons, 30