# Highest Binding Energy per Nucleon

According to Wikipedia

Isotope of nickel has the highest binding energy per nucleon. But according to a statement in the standard textbook of our country it is said that Fe has the highest binding energy per nucleon.

Now I'm confused if I should believe at what is written on the internet or at the textbook that is being used by all high schools in our country. I hope this is not out of topic. Please let me know which element actually has more binding energy per nucleon with a reliable source.

You are in CBSE class $12$, Me too. Preparing for boards? Me too. Hope your revision's going on good!

Okay, coming to the question, then when I was reading this chapter(one of my fav after optics), I also happened to notice this mistake given in NCERT. Actually, wiki is right!

The binding energy per nucleon for $\rm 28\text-Nickel\text-62$ is $8.7944965967742$, but for $\rm 26\text-Iron\text-56$, it is $8.7902483214286$. Clearly, for nickel it is higher.

Evidence? Yeah, I have.