The diagram that uses circles to display elements of different sizes is called a "Venn diagram" when showing the relationships between sets. However, if the focus is on representing quantities or sizes of different groups, it is often referred to as a "bubble chart." Both types of diagrams utilize circles, but their purposes and contexts differ.
possible in scientific methods
Ammonia is composed of one nitrogen atom and three hydrogen atoms.
Selenium can react with certain elements without forming new compounds primarily through physical interactions or surface phenomena. It can interact with metals like lead and mercury through adsorption processes, where selenium adheres to the surface of these metals without creating new chemical bonds. Additionally, selenium can engage in redox reactions with various substances, depending on the specific conditions, but typically these interactions still involve the formation of compounds.