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| Chemicals are at the base of the ________. |
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| _______ is anything that occupies space and has mass (wt). |
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| a substance that cannot be broken down to other substances |
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| the 25 essential elements that are required to survive |
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| a substance consisting of two or more different elements combined in a fixed ratio |
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Carbon, Hydrogen, Oxygen, Nitrogen
(CHON) |
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| smallest unit of matter that still retains the properties of an element |
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| partical of an atom that has a single positive electrical charge (resides in the nucleus) |
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| partical of an atom that is electrically neutral (resides in nucleus) |
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| partical of an atom that has a single negative clectrical charge |
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| the sum of the number of protons and electrons in the nucleus |
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| has the same number of protons and elections but differ in the amount of neutrons |
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| an atom or molecule with an electrical charge (depends on outer shell) |
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| when atoms share outer-shell electrons this happens |
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| when atoms are held together by covalent bonds a ______ is formed |
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| the pull by atoms for shared elections (in covalent bonds) |
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| the bonds formed when the pull toward each atom is = because each atom has the same electro negativity |
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| the bond formed due too unequal electron sharing |
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| molecules with both a slight negative charge and a slight positive charge |
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| weaker than covalent bonds; bond formed because the +charged region is always a hydrogen atom |
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| A property where hydrogen bonding causes molecules to stick together |
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| a measure of how difficule it is to break the surface liquid (hydrogen bonds responsible!) |
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| ice is ____ dense than water |
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| how many atoms that are floating around in water is due to _____ |
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| three different forms of water |
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| When hydrogen bonds are stable ____ is formed |
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| When Hydrogen bonds constantly break and re-form |
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| Chemical reactions contain both _____ and _____. |
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| When water freezes each molecule forms a stable hydrogen bond with __ neighbors |
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| used to describe whether a solution is acidic or basic. |
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| pH ranges from 0-14. 0 being most ____ and 14 being most _____. |
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| if a solution is neither acidic or basic it is ____. (7) |
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