Iron has four stable isotopes: 54 Fe (5.845% of natural iron), 56 Fe (91.754%), 57 Fe (2.119%) and 58 Fe (0.282%). Twenty-four artificial isotopes have also been created.

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Nov 11, 2025 · Iron (Fe), chemical element and one of the transition elements, the most-used and cheapest metal. Iron makes up 5 percent of Earth’s crust and is second in abundance to …

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Archaeological evidence suggests that people have been using iron for at least 5000 years. Iron is the cheapest and one of the most abundant of all metals, comprising nearly 5.6% of the …

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Jan 21, 2025 · 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. Iron is the most common element on Earth …

Look up Fe, fe, fé, FE, or f.e. in Wiktionary, the free dictionary.

The Fundamentals of Engineering (FE) exam is generally your first step in the process to becoming a licensed professional engineer (P.E.). The Principles and Practice of Engineering …