The element chromium (atomic number 24) belongs to the

The element chromium has an atomic number of 24, which is a key property that determines its electron configuration and position in the periodic table. The distribution of electrons in chromium, based on its atomic number, can be calculated as follows:

• The first shell accommodates 2 electrons.
• The second shell holds 8 electrons.
• The third shell contains 8 electrons.
• In the fourth shell, the distribution is (2 + 4), where 2 electrons fill the 4s orbital, and 4 electrons occupy the 3d orbital.

Adding up the electrons, we confirm that the total is 24, consistent with the chromium atomic number. This electron configuration, written as [Ar] 3d54s1, places chromium in the 4th period of the periodic table. Furthermore, it belongs to the first transition series, as its d-orbital electrons begin to participate in chemical bonding.

Chromium's atomic number not only defines its position but also explains its unique chemical properties. As a transition metal, it exhibits variable oxidation states and forms colorful compounds, characteristic of elements in the first transition series.

Understanding the chromium atomic number and its electron configuration is essential for identifying its placement and behavior in the periodic table, making it a significant element in both chemistry and industrial applications.