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chemistry
| Question | Answer |
|---|---|
| atom | The most basic unit of matter |
| matter | a basic way of classifying things (solid, liquid, gas) |
| elements | one of a class of substances that cannot be separated into simpler substances by chemical means. |
| compounds | two elements that are chemically combined |
| mixture | two elements that are physically combined |
| heterogenous | a mixture that has large parts that u can see |
| homogenous | a mixture where it has small parts that you can not see because they are mixed together |
| physical properties | what you can see on an object or feel |
| chemical properties | what you can not see because it is chemically combined into the object |
| physical changes | when an object just changes physical properties and not chemical |
| chemical changes | When an object changes completely |
| periodic table | a table that shows all of the elements ever found and logs their atomic mass and number |
| metals | something on the periodic table that is solid at room temperatur |
| nonmetals | something on the periodic table that is a liquid or gas at room temperature |
| metalloids | a cross between metals and nonmetals |
| luster | the shine of a metal |
| conductor | a metal that can conduct heat or electricity |
| mallebale | they can be bent and pounded into different shapes |
| ductile | they can be drawn into wires without breaking |
| high density | having a high concentration |
| dull | they do not shine |
| non-conductors | metals that do not conduct electricity or heat |
| brittle | fragile, easy to break |
| periods of the periodic table | the rows on the periodic table |
| Groups/families of the periodic table | The columns on the periodic table |
| Atomic Number | The number of protons in an atom |
| Atomic Mass/weight | The weight of the neutron in an atom |
| neutrons | a neutrally charged particle |
| protons | a positively charged particle |
| electrons | a negatively charged particle |
| chemical formulas | The formula that shows how many elements are in a compound |
| subscripts | the thing that show how many elements there are in that compound |
| chemical symbols | one to three letters that show what the element is |
| chemical equation | used to represent that a chemical reaction has occurred |
| reactant | -substances broken apart or combined in a chemical reaction; located on the left side of the arrow. |
| product | new products formed in a chemical reaction; located on the right side of the arrow |
| Law of conservation of matter | the law that states that no matter can be created or destroyed but only change form |
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