| What does a pure substance consist of? | element + compound |
| The thing present at the start of a chemical reaction. | reactant |
| The substance made in the chemical reaction | product |
| Types of Mixtures | homogeneous and heterogeneous |
| Isotope | Atom with same number of protons (atomic #)and different number of neutrons (mass #) |
| If the decimal point is moved to the left, what is the exponent? | positive |
| How do you find density? | Mass over volume |
| Count the least # of sig figs when using... | multiplication and division |
| How to find mass? | density x volume |
| How to find volume? | Mass over density |
| Another name for chemical reaction | chemical change |
| Solid, liquid or gas mixture that is uniform structure all throughout (cannot be seen separately) | homogeneous mixture |
| A mixture that is not uniform and can be seen separately. | heterogeneous mixture |
| Single type of atom | element |
| Two or more types of elements held by chemical bond | compound |
| If the decimal is moved to the right, what is the exponent? | negative |
| How close to the actual answer.. | accuracy |
| How close the answers you got are to each other.. | precision |
| Use decimal places in sig figs when.. | adding and subtracting |
| J.J Thomson | used cathode ray to discover electrons and develop Plum Pudding Model. |
| cathode is | negative |
| anode is | positive |
| What did Rutherford discover? | 3 kinds of radioactivity; beta,alpha and gamma |
| What did Rutherford's gold foil experiment tell us? | that every atom has a nucleus |
| electrons and protons tells us the | charge |
| protons and neutrons tells us the | mass |
| Democritus | first to suggest atoms existence. |
| Dalton | atomic weight and atomic theory. |
| Millikan | calculated charge of proton/electron with oil drop experiment |
| Chadwick | discovered neutron |
| amu | atomic mass units |
| Hindenburg | found the uncertainty of electrons. |
| Order of atom models | Dalton/Thomson/Rutherford/Bohr |
| Ion | atoms with a charge |
| Metals loose electrons forming..? | cations |
| Non metals gain electrons forming | anions |
| Electron Cloud | Shows most responsible place where electrons are |
| Who found out the atom was 99% empty | Rutherford |
| Who discovered energy levels | Bohr |
| Why is Bohr model wrong | It does not support the uncertainty theory and doesn't work for larger atoms. |
| mass spectrometer function | uses ions, chemical substances,electricity and magnetic fields to get the mass of a charged atom |
