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.
Read more about Iron.
Famous quotes containing the word iron:
“Industrial man—a sentient reciprocating engine having a fluctuating output, coupled to an iron wheel revolving with uniform velocity. And then we wonder why this should be the golden age of revolution and mental derangement.”
—Aldous Huxley (1894–1963)
“A shadow has fallen upon the scenes so lately lighted by the Allied victory.... From Stettin in the Baltic to Trieste in the Adriatic, an iron curtain has descended across the Continent.”
—Winston Churchill (1874–1965)
“In the course of history, men come to see that “iron necessity” is neither iron nor necessary.”
—Friedrich Nietzsche (1844–1900)