Rabu, 03 Oktober 2012

Matter, Elements, Atoms, and Molecules

Everything around us is made up of solids, lipids, or gases. Despite their obvious differences in physical appearance, they are all made up of matter and share the same basic structure. Matter is anything that has weight and takes up space. All matte is composed of basic structure called elements. An element is a substance that cannot be broken down to other substance by chemical reactions. Elements are composed of atoms. An atom is the smallest unit of matter. All atoms are comprised of a nucleus containing protons and neutrons, with electrons spinning around them. A compound is a substance consisting of two or more elements combined in a fixed ratio. A molecule is the smallest unit of a compound, just as an atom is the smallest unit of an element.

-Zambak