What do you call an element that has the same number of protons & neutrons? (Basically, the opposite of an isotope)

1 Answer
Feb 20, 2018

It would still be an isotope.

Explanation:

Isotopes encompass all variations of neutrons.

So if it had the same number of protons and neutrons, it'd still be an isotope. If it had one neutron higher, it'd be a different isotope but an isotope nonetheless.

For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively but they are all isotopes.

If you were referencing an element that only has one isotope then you'd call it monoisotopic.

https://en.wikipedia.org/wiki/Monoisotopic_element