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CHEM TEST
Mrs. Eisenlord
| Question | Answer |
|---|---|
| Where all elements are listed | Periodic Table |
| Smallest particle of an element | atom |
| Center of an atom | nucleus |
| Positively charged particles | protons |
| Particles with no charge | neutrons |
| Negatively charged particles located outside of the nucleus | electrons |
| This is the same as the number of protons and electrons | atomic number |
| Is the number of protons and neutrons added together | atomic mass |
| Most elements fall under this category | metals |
| Most elements are this phase at room temperature | solid |
| Bromine and mercury are the only two of these on the Periodic Table | liquids |
| O, Au and Na are all examples of this | chemical symbols |
| Elements in a compound are chemically ___ | bonded |
| Mixtures can always be | physically separated |
| Compounds always have a chemical symbol with two or more | capital letters |
| Atoms in this phase are tightly packed together | solid |
| Atoms in this phase are loosely packed together and can flow past each other | liquid |
| Atoms in this phase are spread out and fast moving | gas |
| A liquid has no definite | shape |
| A liquid has a definite | volume |
| When multiple elements and compounds are physically mixed together | mixture |
| Two elements that are chemically bonded | compound |
| A gas has indefinite | shape and volume |
| If a chemical symbol has more than one capital letter it must be a | compound |
| When a gas turns into a liquid | condensation |
| When a liquid turns into a solid | freezing |
| When a solid turns into a liquid | melting |
| When a liquid turns into a gas | boiling |
| Which of these is an element: salt, oxygen or carbon dioxide | oxygen |
| which of these is a mixture: water, silicon or sand | sand |
| Which of these is a compound:water, carbon dioxide or baking soda | all of them |
| Changes that do not create new substances and can be reversed | physical changes |
| Changes that create new substances and can't be reversed | chemical changes |
| The numbers in a chemical formula tell us the | ratio |
| Symbol O | oxygen |
| Symbol Na | sodium |
| Symbol Nd | neodymium |
| Symbol Fe | iron |
| Symbol Au | gold |
| Atomic number 7 | nitrogen |
| Atomic number 19 | potassium |
| Atomic number 74 | tungsten |
| Atomic Number 22 | titanium |
| Atomic number 28 | nickel |
| Carbon's chemical symbol | C |
| Platinum's chemical symbol | Pt |
| Iron's chemical symbol | Fe |
| Iodine's chemical symbol | I |
| Sulfur's chemical symbol | S |