What does a Gram Negative stain show? - Stains the background of bacteria - The dye does not stick to the specimen, instead settles around its boundaries, creating a silhouette
A chemical element is a pure substance which is composed of a single type of atom, characterized by its particular number of protons in the nuclei of its atoms, known as the atomic number and represented by the symbol Z. The mass number is the sum of the number of protons and neutrons in a nucleus.
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. Elements are defined by the number of protons they possess. Examples of Elements: copper, cesium, iron, neon.