The overall charge on a non-ionized atom is:

The overall charge on a non-ionized atom is zero because it has an equal number of protons and electrons. Protons, which carry a positive charge, are located in the nucleus of the atom, while electrons, which carry a negative charge, orbit around the nucleus. In a neutral or non-ionized state, these positive and negative charges balance each other out, resulting in a net charge of zero.

If an atom were to gain or lose electrons, it would then become an ion, which would carry a positive or negative charge, but in its standard, non-ionized form, the charges are balanced, leading to an overall charge of zero. The concept of charge neutrality in non-ionized atoms is foundational in understanding atomic structure and the behavior of matter in various chemical reactions.