major constituent
121Kamacite — is a mineral. It is an alloy of iron and nickel, usually in the proportions of 90:10 to 95:5 although impurities such as cobalt or carbon may be present. On the surface of Earth, it occurs naturally only in meteorites. It has a metallic lustre,… …
122Lead — (pronEng|ˈlɛd) is a main group element with a symbol Pb ( la. plumbum). Lead has the atomic number 82. Lead is a soft, malleable poor metal, also considered to be one of the heavy metals. Lead has a bluish white color when freshly cut, but… …
123Rayleigh scattering — This article is about the optical phenomenon. For the magnetic phenomenon, see Rayleigh law. For the stochastic distribution, see Rayleigh distribution. For the wireless multipath propagation model, see Rayleigh fading. Rayleigh scattering causes …
124Silicate — For the artificial intelligence androids of the 1990s science fiction series , see Silicate (AI) A silicate is a compound containing an anion in which one or more central silicon atoms are surrounded by electronegative ligands. This definition is …
125Stromatolite — Stromatolites (from Greek στρώμα, strōma , mattress, bed, stratum, and λιθος, lithos , rock) are layered accretionary structures formed in shallow water by the trapping, binding, and cementation of sedimentary grains by biofilms of microorganisms …
126Meselson-Stahl experiment — The Meselson Stahl experiment was an experiment by Matthew Meselson and Franklin Stahl which demonstrated that DNA replication was semiconservative. Semiconservative replication means that when the double stranded DNA helix was replicated, each… …
127Tangerine — This article is about the citrus fruit. For other uses, see Tangerine (disambiguation). Tangerine Scientific classification Kingdom: Plantae …
128Down quark — Composition Elementary particle Statistics Fermionic Generation First Interactions Strong, Weak, Electromagnetic force, Gravity Symbol …
