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en.wikipedia.org/wiki/Chemical_compound

A chemical compound is an entity consisting of two or more atoms, commonly two from different ... A chemical element bonded to an identical chemical element is not a .... For compounds that exist as molecules, the formula for the molecular unit is ... The temperature at which such fragmentation occurs is often called the ...

www.answers.com/Q/What_are_Active_elements_that_never_exist_alone_in_nature

What is the smallest unit of an element that can exist either alone or in combination? The smallest ... What are the compound and elements that exist in nature?

www.answers.com/Q/Do_molecular_elements_exist_in_nature

Yes, The elements hydrogen, nitrogen, oxygen, and sulfur are all molecular elements that exist ... Active element that never exist alone in nature are known as?

www.encyclopedia.com/science-and-technology/chemistry/compounds-and-elements/halogen-elements

Make research projects and school reports about Halogen elements easy with credible ... had any way of knowing about electrons, let alone electron configurations. ... Due to this high level of reactivity, the halogens are almost never found in pure .... yet it also exists in harmless compounds, primarily in the mineral known as ...

www.chemistryexplained.com/elements/C-K/Gold.html

Gold has been called the most beautiful of all chemical elements. Its beauty has ... Gold is a heavy metal in a group known as the transition metals. Gold is also ... Occurrence in nature. Gold occurs .... The active metal replaces gold in the compound, leaving pure gold. ... This gold exists in the form of jewelry, coins, or bullion.

www.chemistryexplained.com/elements/C-K/Helium.html

Inert means that an element is not very active. It will not combine ... He called the element helium. SYMBOL He ... He concluded that there must be an element on the Sun that had never been seen on Earth. The name ... Was there an element on the Sun that did not exist on Earth? Had he ... Occurrence in nature. Helium is  ...

www.reference.com/science/active-element-group-17-eb008dac001bfd9f

The most active element in group 17 (the Halogens) is fluorine. This is ... The halogens exist as diatomic molecules in the form of X2. ... Active Elements That Never Exist Alone in Nature Are Known as · Elements within a Group Have a Similar ...

www.britannica.com/science/alkali-metal

Jun 21, 2017 ... alkali metal: any of the six chemical elements that make up Group 1 (Ia) of the periodic ... The alkali metals are so called because reaction with water forms alkalies (i.e., ... that they are generally found in nature combined with other elements. ... Alloys of alkali metals exist that melt as low as −78 °C (−109 °F).

www.rsc.org/periodic-table/element/27/cobalt

Element Cobalt (Co), Group 9, Atomic Number 27, d-block, Mass 58.933. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.