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| The branch of science that considers the composition of matter. |
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| The fundamental substances that make up all matter. |
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| The smallest complete unit of elements. |
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| Attractive force between atoms. |
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| The dense core of atoms, composed of protons and neutrons. |
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| The number of protons in a nucleus. |
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| The number of protons and neutrons in an atom. |
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| Atoms with the same atomic numbers but different atomic weights. |
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| Atoms that gain or lose electrons and become electrically charged. |
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| A chemical attraction between two ions by transfer of electrons. |
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| A chemical attraction between two atoms in which they share electrons. |
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| A weak chemical attraction between a hydrogen atom and an atom of oxygen or nitrogen. |
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| A unit made up of two or more bonded atoms. |
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| A substance made up two or more chemically bonded elements. |
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| A formula that represents the numbers and types of atoms in a molecule. |
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| Illustrations that show the single and double bonds between atoms. |
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| The reaction of when two or more atoms form a more complex structure. |
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| When the bonds within a molecule break to form a more simple structure. |
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| A reaction where two different types of molecules trade positions as bonds are broken and new bonds are formed. |
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| Specific atoms or molecules that can change the speed of a reaction without being consumed in the process. |
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| Substances that release ions in water. |
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| Electrolytes that release hydrogen ions in water. |
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| Electrolytes that release ions that bond with hydrogen ions. |
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| The scale that measures the hydrogen ion concentration in a substance. |
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| Chemicals that include both carbon and hydrogen atoms. |
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| Any chemicals that don't include both carbon and hydrogen atoms. |
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| Organic compounds containing carbon, hydrogen, and oxygen in a 1:2:1 ratio. |
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| Carbohydrates with shorter chains. |
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| Organic substances that are insoluble in water. |
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| An organic molecule that consists of glycerol and fatty acids. |
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| Complex structures that consist of four interconnected rings of carbon atoms. |
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| Nitrogen-containing organic compounds consisting of amino acids. |
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| The building blocks of proteins. |
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| Acids that form genes and take part in protein synthesis. |
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| A building block of a nucleic acid molecule, consisting of a sugar, a nitrogenous base, and a phosphate group. |
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