Question

edpuzzle - isotopes & isotope symbols multiple - choice question why is iron - 58 the heaviest? because it has 32 neutrons because it has 26 protons because it has 30 neutrons need to ask or add anything?

Explanation:

The mass number of an isotope is the sum of protons and neutrons. All iron - isotopes have 26 protons. Iron - 58 has a mass number of 58. So the number of neutrons is 58 - 26=32. The more neutrons an isotope has, the greater its mass. Since iron - 58 has the most neutrons among these iron - isotopes shown, it is the heaviest.

Answer:

because it has 32 neutrons