Molecular Element

Beryllium
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A molecular element are elements, mostly diatomic non metals which exists as molecule, that is, two or more atoms are bound and can exists independently and still retain the properties of that substance What is an element? An element is the single, smallest entity of a pure substance which can take part in chemical reaction.
Molecular elements. Elements with diatomic molecules (two atoms of that element bonded together) molecular compound. Compounds formed from two or more nonmetals. Have No Fear Of Ice Cold Beer! Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine and Bromine.

Beryllium

The molecular mass (m) is the mass of a given molecule: it is measured in daltons (Da or u). Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element. 4,717 Chemical Engineer jobs available on Indeed.com. Apply to Chemical Engineer, Senior Process Engineer, Product Development Engineer and more!

A chemical species is a chemical substance or ensemble composed of chemically identical molecular entities that can explore the same set of molecular energy levels on a characteristic or delineated time scale. These energy levels determine the way the chemical species will interact with others (engaging in chemical bonds, etc.). The species can be atom, molecule, ion, radical, and it has a chemical name and chemical formula. The term is also applied to a set of chemically identical atomic or molecular structural units in a solid array.^[1]^[2]

In supramolecular chemistry, chemical species are those supramolecular structures whose interactions and associations are brought about via intermolecular bonding and debonding actions, and function to form the basis of this branch of chemistry.

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For instance:

The chemical species argon is an atomic species of formula Ar;
dioxygen and ozone are different molecular species, of respective formulas O₂ and O₃;
chloride is an ionic species; its formula is Cl⁻;
nitrate is a molecular and ionic species ; its formula is NO₃⁻;
methyl is a molecular and radical species; its formula is CH₃^•;
sodium chloride is NOT a species: its units are not identical, the sodium and chloride ions each have their specific energy levels;
DNA is NOT a species: the name is generically applied to many molecules of different formulas (each DNA molecule is unique).

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