Terms : Hide Images
| 4836916632 | hydrogen bond | slight attraction between Hydrogen of one atom and N, F, or O on another. Represented by dotted lines |  | 0 |
| 4836916643 | matter | anything that has mass and takes up space |  | 1 |
| 4836916644 | compound | substance consisting of two or more elements | 2 | |
| 4836916645 | element | substance that cannot be broken down to other substances by chemical reactions |  | 3 |
| 4836916646 | atomic nucleus | made up of protons (+) and neutrons (0); |  | 4 |
| 4836916647 | atomic number | number of protons; determines an element |  | 5 |
| 4836916648 | mass number | protons + neutrons |  | 6 |
| 4836916649 | radioactive isotope | unstable nucleus due to high number of neutrons. breaks down at a rate called a half-life |  | 7 |
| 4836916652 | valence electrons | # electrons in outer shell of atom |  | 8 |
| 4836916653 | covalent bond | share a pair of electrons to fill outer shell |  | 9 |
| 4836916654 | ionic bond | transfer of electron(s) from one molecule to another to fill outer shell |  | 10 |
| 4836916657 | electronegativity | attraction of an atom for the electrons of covalent bond |  | 11 |
| 4836916658 | polar covalent bond | electrons not shared equally between two atoms due to differences in electronegativity |  | 12 |
| 4836916660 | ion | charged atom |  | 13 |
| 4836916661 | van der Waals | weak attraction due to asymmetrical electron arrangement AKA London Dispersion Forces |  | 14 |
| 4836916662 | chemical reaction | making/breaking of chemical bonds which changes matter composition |  | 15 |
| 4836916663 | chemical equilibrium | forward and reverse reactions occur at the same rate |  | 16 |
| 4836916671 | acid | substance that increases H+ concentration |  | 17 |
| 4836916672 | base | substance that reduces the H+ concentration |  | 18 |
| 4836916673 | pH scale | measure the amount of H+ concentration using a log scale |  | 19 |
| 4836916674 | buffer | substance that resists changes in pH when small amounts of acid/base are added |  | 20 |
| 4836948918 | atomic mass | average of the masses of all the isotopes of an element in nature |  | 21 |
| 4836957893 | Redox | a reaction in which electrons or H atoms are transferred between atoms (oxidation/reduction) |  | 22 |
