A positively charged element (nutrient) in the soil. Opposite of cation is anion. Cations are positively charged chemical elements in the soil. Chemically speaking their charge is due to the balance of charge between neutrons (positive) and electrons (negative). Familiar cations that plants need include potassium, calcium, magnesium and iron. These are held onto negatively charged soil particles. Clay and organic materials in the soil have the most negatively charged sites attractive to cations. This is where cations like potassium and calcium are located and stored until released into the soil water for uptake by plant roots.
a positively charged ion that is formed by the removal of an electron from a neutral species, e.g., the removal of an electron (e-) to a neutral sodium atom (Na) forms a singly charged sodium cation (Na+), similarly the removal of two electrons from a neutral magnesium atom (Mg) forms a doubly charged cation (Mg2+).
The positive ion that results when an atom loses one or more electrons. A cation (pronounced "KAT-ie-un") is named after the element of which it is anion and thus is called, for instance, the aluminum ion or the aluminum cation.
Refers to chemical ions present that carry a positive charge. The common cations present in lakes in normal order of decreasing concentrations follow: calcium (Ca++), magnesium (Mg++), potassium (K+), sodium (Na+), ammonium (NH4+), ferric iron (Fe+++) or ferrous iron (Fe++), manganese (Mn++), and hydrogen (H+).
When a salt is dissolved it has two charged molecules: a cation (positively charged), which can behave as an acid, and an anion (negatively charged), which can act as a base. If a surface has a negative charge it is called cationic and can be used to capture positively charged molecules.