If an atom contains more electrons than protons, it is a cation an anion electrically neutral

An anion.

An anion. 

This is because an anion is an ion that has a negative charge. Electrons are negatively charged particles while protons are positively charged. Generally, they become electrically neutral if they are the same. However, in this case, the electron which is "negative" is more than the positive which means the overall ion is negative and therefore an anion. 

Let me know if you need anything else.  

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.