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Chemical properties of elements and compounds - Lenntech Atomic number The atomic number indicates the number of protons within the core of an atom. The atomic number is an important concept of chemistry and quantum mechanics. Organic compound - Wikipedia For many centuries, Western physicians and chemists believed in vitalism.This was the widespread conception that substances found in organic nature are created from the chemical elements by the action of a "vital force" or "life-force" (vis vitalis) that only living organisms possess.Vitalism taught that these "organic" compounds were fundamentally different from the "inorganic" compounds that ... Chemical element - Wikipedia A chemical element is a species of atom having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z). For example, the atomic number of oxygen is 8, so the element oxygen consists of all atoms which have 8 protons.. One hundred eighteen elements have been identified: the first 94 occur naturally on Earth, and the remaining 24 are synthetic elements.
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