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.
Reaction, Chemical. the transformation of one or more substances into one or more new substances, differing from the original in chemical composition or structure. Both the total number of atoms of any given element and the chemical elements making up the substances remain unchanged during a chemical reaction.