The atomic number of zinc is 30, and the atomic number of chromium is 24.
Understanding Atomic Number
The atomic number (Z) is a fundamental property of a chemical element, representing the total number of protons found in the nucleus of every atom of that element. This number is unique to each element and dictates its position in the periodic table, defining its chemical identity and properties.
Atomic Numbers of Zinc and Chromium
Based on scientific data, the specific atomic numbers for zinc and chromium are as follows:
| Element | Symbol | Atomic Number (Z) |
|---|---|---|
| Zinc | Zn | 30 |
| Chromium | Cr | 24 |
Insights into Zinc (Zn)
- Key Characteristics: Zinc is a silvery-white, diamagnetic metal, belonging to the group 12 of the periodic table. It is relatively brittle at room temperature but becomes malleable at 100 to 150 °C.
- Biological Importance: Zinc is an essential trace element for human health, playing a crucial role in numerous biological processes, including immune function, protein synthesis, and wound healing.
- Industrial Applications: Its primary industrial use is as an anti-corrosion coating for steel (galvanizing) and as an alloying element in brass. Zinc compounds are also used in various applications, from pigments to pharmaceuticals.
Insights into Chromium (Cr)
- Key Characteristics: Chromium is a lustrous, brittle, hard metal with a steel-gray color. It is highly resistant to corrosion and has a high melting point. It is the first element in Group 6.
- Essential Trace Element: In trace amounts, chromium is considered an essential nutrient for humans, particularly in glucose metabolism.
- Industrial Applications: Its most significant application is in the production of stainless steel, where it imparts corrosion resistance and a shiny finish. It's also used in electroplating (chrome plating), as a pigment in paints (chromium green), and in various refractory materials.
Both zinc and chromium are transition metals, known for their varied oxidation states and diverse applications in chemistry, biology, and industry.
