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| 8361498839 | element | the basic form of matter that cannot be broken down | 0 | |
| 8361503272 | compound | two or more different elements combined in a fixed ration | 1 | |
| 8361507353 | atom | the smallest unit of an element that still has the properties of that element | 2 | |
| 8361512207 | neutron | -no charge -found in the nucleus -mass of 1 amu | 3 | |
| 8361518250 | protons | -positive charge -found in the nucleus -mass of 1 amu | 4 | |
| 8361524117 | electrons | - negative charge -found outside the nucleus -little mass -potential energy increases as their distance from the nucleus increases -orbit the nucleus in energy levels | 5 | |
| 8361530923 | atomic number | number of protons in the nucleus of an atom | 6 | |
| 8361536392 | mass number | number of protons plus the number of neutrons in the nucleus | 7 | |
| 8361541403 | isotope | an element that has a different mass than normal due to a change in the normal number of neutrons | 8 | |
| 8361572667 | 2 | the first energy level contains how many electrons | 9 | |
| 8361572669 | 8 | the second energy level contains how many electrons | 10 | |
| 8361577329 | 8 | the third energy level contains how many electrons | 11 | |
| 8361583665 | inert or unreactive | an element whose valence shell is complete is said to be what | 12 | |
| 8361591179 | covalent bond | sharing of a pair of valence electrons by two atoms | 13 | |
| 8361601215 | non polar covalent bond | equal sharing of electrons | 14 | |
| 8361601216 | polar covalent bond | unequal sharing of electrons | 15 | |
| 8361606936 | ion | transfer of electrons between atoms | 16 | |
| 8361611490 | ionic bond | attraction between two oppositely charged ions | 17 | |
| 8361615768 | cation | positively charged ion (lost electron) | 18 | |
| 8361620189 | anion | negatively charged ion (gained electron) | 19 | |
| 8361639554 | polar covalent | this hogging of electrons results in which type of bond between oxygen and hydrogen within the water molecule | 20 | |
| 8361645598 | hydrogen bonds | occur between two polar molecules or between different polar regions of one large macro molecule | 21 | |
| 8361654089 | van der waals interactions | weak attractions that occur when atoms and molecules are very close together, may occur in regions of a single large molecule such as a protein | 22 | |
| 8361668172 | shape | determines how molecules recognize and respond to one another | 23 | |
| 8361680660 | reactants | starting materials are known as | 24 | |
| 8361685662 | products | ending materials are known as | 25 | |
| 8361699979 | organic chemistry | the study of carbon compounds | 26 | |
| 8361712344 | isomers | molecules with same molecular formula but different structures, different chemical properties | 27 | |
| 8361721536 | hydrocarbons | simplest C molecules; combinations of C and H | 28 | |
| 8361733741 | functional groups | different elements added to organic molecules that change their properties | 29 | |
| 8361739052 | hydroxyl | -OH alcohols ex-ethanol | 30 | |
| 8361746606 | carbonyl | C=O O double bonded to C C=O end= aldehyde C=o middle= ketone | 31 | |
| 8361759623 | carboxyl | -COOH compounds with COOH= acids fatty acids amino acids | 32 | |
| 8361768583 | amino | -NH2 | 33 | |
| 8361777637 | Sulfhydryl | -SH S bonded to H | 34 | |
| 8361783401 | Phosphate | -PO4 function is to transfer energy between organic molecules | 35 | |
| 8361796310 | methyl | -CH3 not a reactive group, serves as a recognizable tag on biomolecules used in DNA methylation | 36 |
