# Consider a neutral atom with 30 protons and 34 neutrons. What is the atoms number of electrons?

Jul 9, 2016

All you needed to know was that:

• The atom is neutral.
• The atom has $\setminus m a t h b f \left(30\right)$ protons.

Neutrality implies that all charges cancel.

Protons are positively charged, and electrons are negatively charged.

Therefore, a neutral atom has the same number of protons as electrons, no matter the number of neutrons.

You have two charges, and two types of particles. If $1 + \left(- 1\right) = 0$, 30 + ?? = 0? At this point, you should be able to infer what the answer is. ;)