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.
Definition. Elements that lose electrons easily, that are lustrous and malleable and that are good conductors of heat and electricity are known as metals. Metal elements can be broken down into several categories, one of which is the category of transition metals. A transition metal is defined as a metal with inner d or f orbitals being filled. Orbitals describe ways that electrons can be organized around a nucleus. There are four types of orbitals: s, p, d and f.