Acute medicines for migraine are medications taken when an attack occurs to treat the symptoms. Learn more Acute medicines for migraine are medications taken when an attack occurs to treat the symptoms.
In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. The metals are one of the three groups of elements as distinguished by their ionization and bonding properties, along with the metalloids and nonmetals. On the periodic table, a diagonal line drawn from boron (B) to polonium (Po) separates the metals from the nonmetals.
Meaning: Any metal that is resistant to corrosion or oxidation. Classified under: Nouns denoting substances. Hypernyms (noble metal is a kind of...): metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.) Hyponyms (each of the following is a kind of noble metal): atomic number 79; Au; gold (a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia)