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  2. Cobalt - Wikipedia

    en.wikipedia.org/wiki/Cobalt

    Cobalt is a chemical element; it has symbol Co and atomic number 27. As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, somewhat brittle, gray metal.

  3. Cobalt poisoning - Wikipedia

    en.wikipedia.org/wiki/Cobalt_poisoning

    Cobalt poisoning is intoxication caused by excessive levels of cobalt in the body. Cobalt is an essential element for health in animals in minute amounts as a component of vitamin B 12 . A deficiency of cobalt, which is very rare, is also potentially lethal, leading to pernicious anemia .

  4. Cobalt bomb - Wikipedia

    en.wikipedia.org/wiki/Cobalt_bomb

    The cobalt would then condense and fall back to Earth with the dust and debris from the explosion, contaminating the ground. The deposited cobalt-60 would have a half-life of 5.27 years, decaying into 60 Ni and emitting two gamma rays with energies of 1.17 and 1.33 MeV, hence the overall nuclear equation of the reaction is: 59 27 Co + n → 60 ...

  5. ‘Here it is better not to be born’: Cobalt mining for Big ...

    www.aol.com/better-not-born-cobalt-mining...

    Around 75 per cent of the world’s cobalt is mined in the DRC -- and the world cannot get enough of it. The rare, silvery metal is an essential component to every lithium-ion rechargeable battery ...

  6. Isotopes of cobalt - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_cobalt

    Naturally occurring cobalt, Co, consists of a single stable isotope, 59 Co (thus, cobalt is a mononuclidic element). Twenty-eight radioisotopes have been characterized; the most stable are 60 Co with a half-life of 5.2714 years, 57 Co (271.811 days), 56 Co (77.236 days), and 58 Co (70.844 days). All other isotopes have half-lives of less than ...

  7. Cobalt in biology - Wikipedia

    en.wikipedia.org/wiki/Cobalt_in_biology

    A minimal presence of cobalt in soils therefore markedly improves the health of grazing animals, and an uptake of 0.20 mg/kg a day is recommended because they have no other source of vitamin B 12. [3] Proteins based on cobalamin use corrin to hold the cobalt. Coenzyme B 12 features a reactive C-Co bond that participates in the reactions. [4]

  8. Cobalt-60 - Wikipedia

    en.wikipedia.org/wiki/Cobalt-60

    Cobalt-60 (60 Co) is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. [ 3 ] [ 4 ] : 39 It is produced artificially in nuclear reactors . Deliberate industrial production depends on neutron activation of bulk samples of the monoisotopic and mononuclidic cobalt isotope 59

  9. Doomsday device - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Device

    Many hypothetical doomsday devices are based on salted hydrogen bombs creating large amounts of nuclear fallout.. A doomsday device is a hypothetical construction — usually a weapon or weapons system — which could destroy all life on a planet, particularly Earth, or destroy the planet itself, bringing "doomsday", a term used for the end of planet Earth.