| A | B |
|---|
| What kind of charge do protons have? | Positive + |
| Where are protons located? | nucleus |
| What kind of charge do neutrons have? | positive/negative +/- |
| Where are neutrons located? | nucleus |
| What kind of charge to electrons have? | negative - |
| Where are electrons located? | energy cells |
| Protons + neutrons = | atomicmass |
| Mass of an electron | .0005 amu |
| Scientists have discovered _______ elements | 118 |
| The group on the periodic table that is shiny | ductile and usually solid at room temperature |
| Periodic table is organized by | structure of atoms or elements |
| In the outermost shell that react with other elements | valence electrons |
| Two elements that are joined chemically | compound |
| Example of chemical change | burning branch |
| Two elements that are joined chemically | compound |
| Two substances that are joined physically | mixture |
| Physically change when things joined | homogeneous mixture |
| Example of physical change | Break your pencil |
| Tells you how many atoms of an element you have | subscript |
| Tells you how many molecules of a compound you have | coefficient |
| The state of matter where particles are in fixed locations and the object has a definite shape | solid |
| Causes change in the state of matter | heat/pressure |
| Chemical properties | flammability/oxidation/reactivity |
| Large and small block of ice melts at… | 0 degrees Celsius |
| State of matter where electrons can sometimes escape the ion’s electron cloud | plasma |
| Covalent bond | bond based on the attraction between atoms that share electrons |
| Ionic bond | bond in which electrons are transferred from one atom to another |
| Atom | smallest part of an element |
| chemcial change | a change in which one or more substances combine or break apart to form new substances |
| compound | substance made up of 2 or more elements taht are chemically combined |
| element | substance made up of only 1 type of atom |
| group/family | the columns on the periodic table |
| heterogenous mixture | a mixture that is not the same throughout |
| homogenous mixture | a mixture that is the same throughout |
| isotope | atoms of the same element with different numbers of neutrons |
| metals | shiny |
| mixture | material that contains two or more substances that are not chemcially combined |
| molecule | smallest part of a compound that still has all the properties of that compound |
| non-metals | dull and brittle |
| period | the rows on the periodic table |
| physical change | a change in a substance that does not change its identity |
| pure substance | a substance that contains only one type of molecule |
| solute | something that is dissolved in a solution |
| solvent | the substance in a solution into which something is dissolved |
| valence electrons | electrons ni the outermost energy levels |
