Vocabulary


 * Define and give good examples from LAB, your READINGS IN THE TEXT, and your LIFE. **

** Atom = ** //__The smallest particle of an element that has the chemical properties of that element__// ** Element = ** //__A substance that cannot be broken down into simpler substance by ordinary chemical changes__// //__An element consist of atoms of only one type__// ** Molecule = ** __A group of atoms that are held together by covalent bonds so that they move as a unit__ ** Compound = ** //__A substance made up of two or more different types of atoms bonded together__// **Neutron =** //__A particle that has no electric charge and is located in an atoms nucleus__// **Ion =** //__ An atom or group of atoms that has a positive or negative electric charge __// **Period =** //__ A horizontal row in the periodic table of the elements __// //__ Elements in a period have varying properties __// //__A table of the elements, arranged by atomic number, that shows the patterns in their properties__// ** group = ** //__A vertical column in the periodic table of the elements__// //__Elements in a group have similar properties__// ** Noble gases = **
 * Periodic table = **

** Proton = ** //__A positively charged particle located in an atom's nucleus__// ** Electron = ** //__A negatively charged particle located outside an atom's nucleus__// //__An electron is about 2000 times smaller than either a proton or neutron__// ** Atomic number = ** __//An atomic number is the amount of electrons and protons in an atom.//__ ** Atomic mass = ** __//The atomic mass is the mass of an atom//__ ** Isotope = ** //__An isotope is an atom with a different amount of protons then electrons.__// ** Ion = ** __//An ion is formed when a proton or electron is removed or gained.//__ Valence electrons = **an electron in the outer shell of an atom which can combine with other atoms to form molecules ** Covalent bond = A pair of electrons shared by two atoms Ionic bond = A bond that steals electrons Atomic model = Phase change = A change of an items phase Physical change - A change where the item looks different but is reversible Chemical change = A change where the chemical structure varies Cyclic causality - A cycle Domino causality - A liner change MIXTURE - A combo of two or more substances that do not combine chemicly but remain the same induviduial substance suspension = A mixture in which the different parts are identifiable substamces solution = A solution that is the same throughout

solute - In a solution that is do solved in a solvent

** solvent - **

** dissolve - When a substance disappears into another or is caused by something. **

** catalyst = The Ingredient that speeds up the process of the element. In the cheese lab rement was the catalyst. **

** reactants= **

** products = **

** conservation of mass = **

** endothermic reaction - An endothermic reaction is when a reactant absorbs energy. **

** exothermic reaction - ** ** An exothermic reaction is when a reactant releases energy. **