Terms : Hide Images
| anything that occupies space and has mass | ||
| a pure substance that cannot be broken down into other substances by chemical reactions | ||
| substance containing two or more elements chemically combined in a fixed ratio | ||
| the smallest particle of an element that retains the properties of the element | ||
| subatomic particle having a positive charge; found in nucleus | ||
| subatomic particle having a negative charge; not in nucleus but surrounds it | ||
| subatomic particle without a charge; found in nucleus | ||
| protons and neutrons together; make up the center of an atom | ||
| identifies a specific element; equals the number of protons in an atom of each element | ||
| an unstable atom in which the nucleus decays (breaks down) releasing particles and energy | ||
| atoms having the same numbers of protons but different numbers of neutrons | ||
| occurs when atoms transfer electrons to other atoms | ||
| atoms that have lost or gained electrons | ||
| occurs when atoms share electrons | ||
| atoms that are held together by covalent bonds | ||
| interaction of substances that lead to the formation of new substances | ||
| the starting materials for a reaction; found on left side of chemical equation | ||
| ending materials of a reaction; found on right side of chemical equation | ||
| substance made of two or more elements, one being carbon | ||
| substance made of two or more elements, none of which is carbon | ||
| electrons in the outermost energy level; they are involved in bond formation | ||
| a covalent bond in which one pair of electrons is shared | ||
| a covalent bond in which four valence electrons are shared between two atoms | ||
| indicates the number and types of atoms in a molecule | ||
| shows the number and types of atoms in a molecule and how they are arranged | ||
| indicates the formation of new substances from previous substances |
