Nickel (Ni)
| Atomic Number | 28 |
|---|---|
| Atomic Mass | 58.69344 u |
| Category | Transition metal |
| Electron Config | [Ar] 3d⁸ 4s² |
| Appearance | lustrous, metallic, and silver with a gold tinge |
| Density (STP) | 8908 g/L |
| Melting Point | 1728 K |
| Boiling Point | 3003 K |
| Electronegativity | 1.91 (Pauling) |
| Ionization Energy | 737.1 kJ/mol |
| Atomic Radius | 135 pm |
| Crystal Structure | Face-centered Cubic |
| Discovered By | Axel Fredrik Cronstedt (1751) |
Brief Introduction
Nickel (Ni) is a silvery-white, lustrous, hard, ductile transition metal that is highly resistant to corrosion and oxidation. It is ferromagnetic and is one of only four elements that are magnetic at room temperature. Key details about Nickel (Ni) are as follows:
Uses: Predominantly used in stainless steel (about 70% of nickel use), nickel alloys (Inconel, Monel) for aerospace and chemical processing, electroplating, batteries (nickel-metal hydride, lithium-ion), catalysts (hydrogenation), and in coinage (especially U.S. five-cent "nickel" coin).
Production/Extraction: Extracted from laterite and sulfide ores through various processes including pyrometallurgy and hydrometallurgy. Major producers include Indonesia, Philippines, Russia, and New Caledonia. Often mined with copper and cobalt.
History: Isolated by Axel Fredrik Cronstedt in 1751 from a mineral called nickeline (niccolite). Named after "kupfernickel" (Old Nick's copper or devil's copper) because miners were frustrated that nickel ores resembled copper ore but yielded no copper.
Health Effects & Safety: Some people develop contact dermatitis (nickel allergy) from jewelry or metal objects. Inhaling nickel compounds (especially nickel carbonyl) is toxic and carcinogenic. Essential in trace amounts for some organisms (as urease cofactor). Most nickel compounds should be handled with care.
Price/Market: Price driven by stainless steel demand and battery sector growth (electric vehicles). Indonesia's ore export policies significantly impact global markets. Classified as a critical mineral.
Properties: Ferromagnetic below 354°C, excellent corrosion resistance, ductile and malleable, forms protective oxide layer, catalytic properties, exhibits primarily +2 oxidation state, and high melting point (1455°C).
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