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Science Study Guide

Definition of science terms

TermDefinition
Element that cannot be chemically inter converted or broken down into simpler substances and are primary constituents of matter.
Compound a thing that is composed of two or more separate elements; a mixture
Mixture a substance made by mixing other substances together
Solution a means of solving a problem or dealing with a difficult situation
Solute the minor component in a solution, dissolved in the solvent
Solvent able to dissolve other substance
Physical properties any property that is measurable whose value describes a state of a physical system
Chemical properties a property or characteristic of a substance that is observed during a reaction in which the chemical composition
Energy levels the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have
Ionic formed by the electrostatic attraction of oppositely charged ions.
Covalent of, relating to, or denoting chemical bonds formed by the sharing of electrons between atoms.
Ions an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
Cation positively charged ion
Anion a negatively charged ion
Metallic attraction between the positively charged atomic nuclei of metal atoms
Dot Diagrams A structural formula in which electrons are represented by dots; two dots between atoms represent a covalent bond
Chemical Reactions a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei
Reactants A substance participating in a chemical reaction, especially a directly reacting substance present at the start of the reaction
Products A product is a substance that is formed as the result of a chemical reaction.
Synthesis the composition or combination of parts or elements so as to form a whole
Decomposition A decomposition reaction is a type of chemical reaction where one reactant yields two or more products.
Single Replacement one element is replaced by another in a compound.
Double Replacement type of reaction that occurs when the cations and anions switch between two reactants to form new products
Chemical Formula A chemical formula tells us the number of atoms of each element in a compound
Law of Conservation the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed
Endothermic chemical change that is accompanied by an absorption of heat
Exothermic process or chemical reaction characterized by or causing the liberation or release of heat
Molecules a group of atoms bonded together
Created by: Likeaboss10