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Manganese is a chemical element; it has symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron . Manganese was first isolated in the 1770s.
Download as PDF; Printable version; ... Electron configurations of the chemical elements ... Mn 2 5 - 26 Fe 2 6 - 27 Co 2 7 - 28 Ni 2 8 - 29 Cu 1 10 - 30 Zn 2
The color of chemicals is a physical property of chemicals that in most cases comes from the excitation of electrons due to an absorption of energy performed by the chemical. The study of chemical structure by means of energy absorption and release is generally referred to as spectroscopy .
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... Mn 1.75 Fe 1.80 Co 1.84 Ni 1.88 Cu 1.85 Zn 1.588 Ga
Each chemical element has a unique atomic number (Z— for "Zahl", German for "number") representing the number of protons in its nucleus. [4] Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes.
Naturally occurring manganese (25 Mn) is composed of one stable isotope, 55 Mn. Twenty-seven radioisotopes have been characterized, with the most stable being 53 Mn with a half-life of 3.7 million years, 54 Mn with a half-life of 312.3 days, and 52 Mn with a half-life of 5.591 days.
Download as PDF; Printable version; In other projects ... (→ Chemical elements in East Asian languages) ... 5 = State of matter (sets font color) | 6 = Metal ...
Two forms are generally recognized, α-Mn 2 O 3 and γ-Mn 2 O 3, [10] although a high pressure form with the CaIrO 3 structure has been reported too. [11] Manganese(IV) oxide is a blackish or brown solid occurs naturally as the mineral pyrolusite , which is the main ore of manganese and a component of manganese nodules .