# An isotope of copper contains 34 neutrons. What is its notation?

Sep 4, 2016

The copper nucleus contains $29$ protons, so we have ""^63Cu.

#### Explanation:

The superscript is the sum of protons and neutrons, massive nuclear particles with a positive or a neutral charge. How did I know that copper has 29 protons in its nucleus?

If I have a neutral atom of ""^63Cu, how many electrons are there?

IF there were 35 neutrons, how would I write the isotope?