The chemical element with atomic number 28. Radioactive nickel-56 is produced in explosive burning; the nickel-56 decay chain contributes energy to supernova emission.
The radioactive chain converts nickel-56 through cobalt-56 into iron-56, releasing energy that can power supernova light curves. Electron capture and, where allowed, beta-plus decay convert protons into neutrons; gamma rays and charged decay products deposit some of the released energy. Ionization and escape of decay radiation affect the observed heating.
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Nickel is a silvery-white metal with the chemical symbol Ni and atomic number 28. It is a transition metal and is primarily known for its corrosion resistance, ductility, and ability to withstand high temperatures. Nickel is often used in a range of applications due to these properties. Here are some key points about nickel: 1. **Properties**: Nickel is relatively hard and has a high melting point (about 1,455 °C or 2,651 °F).