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Science SFS
midterm flashcards
| Question | Answer |
|---|---|
| C3H8 | propane |
| anything that takes up space and has mass | matter |
| a very small particle that makes up most kinds of matter and consists of smaller parts called protons, neutrons, and electrons | atom |
| (-)negatively charged particles | electron |
| (+) positively charged particles | proton |
| central part of an atom | nucleus |
| the nucleus of atom "neutral" | neutron |
| mass volume | density |
| states that matter is not created or destroyed but only changes its form | law of conservation of mater |
| where is most of the mass of an atom located | nucleus |
| what did Thomson say about the electron inside the atom? | negatively charged particles in an atom |
| Who said that electrons move energy levels? | Niels Bohr |
| What did Chadwick say about neutrons? | particles that come from the nucleus and have no charge (neutral) |
| Cu=1 ---- 1 N = 1 x 2 = 2 O = 3 x 2 = 6 9 atoms | Cu(NO3)2 |
| H=3 P=1 O=4 8 atoms | H3PO4 |
| look at your pictures on your cards | Bohr Model |
| Mg=1 ----- 1 C = 2 X 3 = 6 H = 3 X 3 = 9 O = 2 x 3 = 6 22 atoms | Mg (C2H3O2)3 |
| practice on worksheets | balance equations |
| tells which elements make up a compound as well as how many atoms of each element are present | chemical formula |
| 2 or more substances mixed together which don't make up a new substance | mixture |
| mixture that is the same throughout | homogeneous mixture |
| a metal made of 2 or more solids | alloy |
| mixture that is not mixed well | heterogeneous mixture |
| the part of the solution that does the dissolving | solvent |
| the part of the solution that is dissolved | solute |
| substance whose smallest unit is made of atoms of more than one element | compound |
| matter that has same composition and properties throughout | substance |
| who was the first person to coin the term atom | Democritus |
| Where did Rutherford say that protons existed | in the nucleus of an atom |
| law of conservation of matter | What was Lavisier's Law called |
| carbon monoxide | CO |
| carbon dioxide | CO |
| hydrogen peroxide | H2O2 |
| water | H2O |
| What is the universal solvent? | water |
Created by:
lyncall
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