Question

what is the atomic symbol and mass number for an atom containing 26 protons and 31 neutrons? answer:

Explanation:

Step1: Determine the atomic symbol

The atomic number (number of protons) of iron (Fe) is 26. So the atomic symbol is Fe.

Step2: Calculate the mass number

Mass number = number of protons + number of neutrons. Given protons = 26 and neutrons = 31, mass number = \(26 + 31=57\)

Answer:

C. \(^{57}\text{Fe}\)