| Question |
Answer |
| Anything that has volume and mass | Matter |
| Smallest unit of an element | Atom |
| Small, dense center of an atom composed of protons and neutrons | Nucleus |
| Positively charged subatomic particle located in the nucleus of atoms | Proton |
| A subatomic particle located in the nucleus of atoms that has no charge | Neutron |
| A negatively charged subatomic particle located in energy levels around the nucleus of atoms | Electron |
| The electrons in the outermost energy level of an atom | Valence electron |
| The basic building blocks of matter and are composed of just one type of atom | Element |
| The number of protons in the nucleus of an atom which identifies the element | Atomic Number |
| The mass of an atom which is the total number of protons and neutrons in the nucleus of an atom | Mass number |
| The average mass of all the isotopes of an element | Atomic Mass |
| Each verticle column of elements on the periodic table | Family/group |
| Each horizontal row of elements on the periodic table | Period |
| A property of matter that describes a substance based on its ability to change into a new substance with different properties | Chemical property |
| A property of matter that can be observed or measured without changing the identiy of the matter | Physical property |
| A change that occurs when one or more substances are changed into entirely new substances with differenct properites. | Chemical change |
| A change that affects the siz, shape, phase or color of a substance but does not affect is composition. The same substance or substances remain. No new ones are formed | Physical change |
| Elements that are shiny, ductile, and malleable and are good conductors or thermal energy and electrical current | Metals |
| Elements that are not shiny and are poor conductors of thermal energy and electric current | Non-metals |
| Elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors. | Metalloids |
| Materials that reduce or inhibit the transfer of thermal energy and electric current | Insulators |
| Materials that conduct thermal energy and electric current very well | Conductors |
| The process by which one or more substances change to produce one or more different substances | Chemical reaction |
| A chemical reaction which absorbs heat energy | Endothermic chemical reaction |
| A chemical reaction in which heat energy is released. | Exothermic chemical reaction |
| A shorthand or abbreviated way to write the name of a chemical element | Chemical symbol |
| A shorthand description that uses chemical formulas to describe a chemical reaction. | Chemical equation |
| The starting substance or substances in a chemical reaction | Reactants |
| The substance or substances that are formed in a chemical reaction | Products |
| A charged particle that forms during chemical changes when one or more valence electrons transfer from one atom to another | Ions |
HHS Shrek
