For example, 2 + 3 + 5 = 10 is an equation. Chemistry A written representation of a chemical reaction, in which the symbols and amounts of the reactants are separated from those of the products by an equal sign, arrow, or a set of opposing arrows. For example, Ca(OH) 2 + H 2 SO 4 = CaSO 4 + 2H 2 O, is an equation.
an element is a pure substance that is made from a single type of atom elements are the building blocks for all the rest of the matter in the world examples of elements include iron oxygen hydrogen gold and helium
Element Definition: A chemical element is a substance that cannot be broken down by chemical means.Elements are defined by the number of protons they possess. Examples of Elements: copper, cesium, iron, neon. By Anne Marie Helmenstine, Ph.D.lement Definition: A chemical element is a substance that cannot be broken down by chemical means.