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[16] [17] [18] A molecule may be homonuclear, that is, it consists of atoms of one chemical element, as with two atoms in the oxygen molecule (O 2); or it may be heteronuclear, a chemical compound composed of more than one element, as with water (two hydrogen atoms and one oxygen atom; H 2 O). A molecule is the smallest unit of a substance that ...
Japan Science and Technology Agency "J-GLOBAL". KEGG: Kyoto Encyclopedia of Genes and Genomes Kyoto University Bioinformatics Center: Compounds Glycans (also enzymes, reactions, pathways) CAS ChEBI ChEMBL MASSBANK NIKKAJI PubChem PDB-CCD "KEGG". K i Database: PDSP ligand binding "Ki Database". KNApSAcK Nara Institute of Science and Technology
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... Compounds are organized into the following lists:
Download as PDF; Printable version; In other projects Wikimedia Commons; ... An alternative listing of inorganic compounds may be found at inorganic compounds by element
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualization of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
Inorganic compounds exhibit a range of bonding properties. Some are ionic compounds, consisting of very simple cations and anions joined by ionic bonding.Examples of salts (which are ionic compounds) are magnesium chloride MgCl 2, which consists of magnesium cations Mg 2+ and chloride anions Cl −; or sodium hydroxide NaOH, which consists of sodium cations Na + and hydroxide anions OH −.
The most known chemical elements whose covalent combinations make up most biological molecules on Earth. [2] All of these elements are nonmetals.. In animals in general, the four elements—C, H, N, and O—compose about 96% of the weight, and major minerals (macrominerals) and minor minerals (also called trace elements) compose the remainder.
Two or more elements combined into one substance through a chemical reaction form a chemical compound. All compounds are substances, but not all substances are compounds. A chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice.
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