An atom of chromium with no charge has a total of 24 electrons, as indicated by the element's atomic number on the periodic table of elements. The atom also holds 24 protons and 28 neutrons.
The electrons in a chromium atom are located in four different energy levels, with two in the first, eight in the second, 13 in the third and one in the fourth. The electron configuration for chromium is written as 1s2 2s2p6 3s2p6d5 4s1. Chromium has six valence electrons, located in the 3d orbital and the 4s orbital. Possible oxidation states for ions of chromium are six, three and two.