Iron
Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the planet Earth as a whole, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. Iron's very common presence in rocky planets like Earth is due to its abundant production as a result of fusion in high-mass stars, where the production of nickel-56 (which decays to the most common isotope of iron) is the last nuclear fusion reaction that is exothermic. This causes radioactive nickel to become the last element to be produced before collapse of a supernova leads to the explosive events that scatter this precursor radionuclide of iron abundantly into space.
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Famous quotes containing the word iron:
“Persistence can grind an iron beam down into a needle.”
—Chinese proverb.
“Manhattan. Sometimes from beyond the skyscrapers, across the hundreds of thousands of high walls, the cry of a tugboat finds you in your insomnia in the middle of the night, and you remember that this desert of iron and cement is an island.”
—Albert Camus (1913–1960)
“It was then that the iron entered my soul.”
—Margaret Thatcher (b. 1925)