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  1. › wiki › MiningMining - Wikipedia

    Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit.The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can ...

  2. Dmitri Ivanovich Mendeleev (sometimes transliterated as Mendeleyev or Mendeleef) (English: / ˌ m ɛ n d əl ˈ eɪ ə f / MEN-dəl-AY-əf; Russian: Дмитрий Иванович Менделеев, tr. Dmitriy Ivanovich Mendeleyev, IPA: [ˈdmʲitrʲɪj ɪˈvanəvʲɪtɕ mʲɪnʲdʲɪˈlʲejɪf] (); 8 February [O.S. 27 January] 1834 – 2 February [O.S. 20 January] 1907) was a Russian ...

  3. › wiki › IonIon - Wikipedia

    The ionizing effect of radiation on a gas is extensively used for the detection of radiation such as alpha, beta, gamma, and X-rays.The original ionization event in these instruments results in the formation of an "ion pair"; a positive ion and a free electron, by ion impact by the radiation on the gas molecules.

  4. Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal bands developed a thick, monumental sound characterized by distorted guitars, extended guitar solos, emphatic beats and loudness.

  5. › wiki › ElectrodeElectrode - Wikipedia

    An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air). Electrodes are essential parts of batteries that can consist of a variety of materials depending on the type of battery.

  6. Using a nonmetal to cover a metal makes it safer to use as an electrical wire. As you advance to another grade level, there are more properties of matter that you will encounter. It is hoped that you will be able to maximize the properties of different materials to create new beneficial products or find other uses for them.

  7. Definition and classification. The terms transition metal (or transition element) are defined in several different ways: . The IUPAC definition defines a transition metal as "an element whose atom has a partially filled d sub-shell, or which can give rise to cations with an incomplete d sub-shell".

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