Knowra Gold Gold Gold is a dense, yellow metallic element with atomic number 79. Its resistance to corrosion, malleability, and rarity have made it valuable in jewelry, technology, and monetary systems.
Chemical element : A pure substance consisting of atoms with the same number of protons. Gold is element 79, distinguished by the 79 protons in each nucleus.
Face-centered cubic crystal structure : A cubic crystal arrangement with atoms at each corner and the center of every face. Gold’s closely packed lattice helps make the metal soft, ductile, and malleable.
Rapid neutron capture process : A nucleosynthesis process that builds heavy atomic nuclei through rapid neutron absorption. Gold’s heavy nuclei are produced by this process in extreme astrophysical environments.
Gold leaf : Extremely thin sheets of gold used to gild surfaces and objects. Gold’s malleability makes it possible to cover objects with a very small amount of metal.
Silver : A lustrous, electrically conductive precious metal with atomic number 47. Silver is more conductive and reflective, but tarnishes more readily than gold.
Atomic number : The number of protons in an atom’s nucleus, which identifies its chemical element. Gold’s atomic number, 79, fixes its identity regardless of isotope or charge.
Malleability : The ability of a material to deform under compression into thin sheets without breaking. Gold can be hammered into exceptionally thin leaf because its crystal planes deform readily.
Neutron star merger : A collision and coalescence of two neutron stars, producing gravitational waves and neutron-rich ejecta. Such mergers can provide the conditions needed to forge gold through rapid neutron capture.
Gold coin : A coin made partly or wholly of gold, often issued as currency or bullion. Gold’s scarcity, durability, and divisibility made it a long-standing material for coinage.
Platinum : A dense, corrosion-resistant transition metal with atomic number 78. Platinum is another noble precious metal, but it is gray-white and typically harder than gold.
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