Terms : Hide Images
| 4852486283 | Matter | anything that takes up space and has mass |  | 0 |
| 4852486284 | Element | any substance that cannot be broken down to any other substance |  | 1 |
| 4852486351 | Compound | a substance consisting of two or more elements in a fixed ratio |  | 2 |
| 4852490417 | Trace Elements | an element indispensable for life but required in extremely minute amounts | 3 | |
| 4852490418 | Atom | the smallest unit of matter that retains the properties of an element |  | 4 |
| 4852492665 | Neutron | an electrically neutral particle (a particle having no electrical charge), found in the nucleus of an atom |  | 5 |
| 4852492666 | Electron | a subatomic particle with a single negative charge; one or more electrons move around the nucleus of an atom | | 6 |
| 4852494039 | Proton | a subatomic particle with a single positive electrical charge, found in the nucleus of an atom | | 7 |
| 4852494040 | Atomic Nucleus | an atom's central core, containing protons and neutrons |  | 8 |
| 4852503101 | Atomic Number | the number of protons in the nucleus of an atom, unique for each element and designated by a subscript to the left of the elemental symbol |  | 9 |
| 4868984292 | Atomic Mass; Atomic Weight | the total mass of an atom, which is the mass in grams of one mole of the atom | | 10 |
| 4852503102 | Mass Number | the sum of the number of protons and neutrons in an atom's nucleus | | 11 |
| 4852504882 | Dalton | a measure of mass for atoms and subatomic particles | 12 | |
| 4852505952 | Isotope | one of several atomic forms of an element, each containing a different number of neutrons and thus differing in atomic mass | 13 | |
| 4852507504 | Radioactive Isotope | an isotope that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy | 14 | |
| 4852515526 | Energy | the capacity to do work (to move matter against an opposing force) | 15 | |
| 4868996549 | Energy Levels | the different states of potential energy for electrons in an atom | 16 | |
| 4852515527 | Potential Energy | the energy stored by matter as a result of its location or spatial arrangement |  | 17 |
| 4852517057 | Electron Shell | an energy level representing the distance of an electron from the nucleus of an atom | 18 | |
| 4852518580 | Valence Shell | the outermost energy shell of an atom, containing the valence electrons involved in the chemical reactions of that atom | 19 | |
| 4852518581 | Valence Electrons | the electrons in the outermost electron shell | 20 | |
| 4852520764 | Orbital | the three-dimensional space where an electron is found 90% of the time | 21 | |
| 4852522165 | Molecule | two or more atoms held together by covalent bonds | 22 | |
| 4852522166 | Single Bond | a chemical bond in which one pair of electrons is shared between two atoms |  | 23 |
| 4852523255 | Chemical Bond | an attraction between two atoms resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms; the bonded atoms gain complete outer electron shells |  | 24 |
| 4852523256 | Double Bond | a chemical bond in which two pairs of electrons are shared between two atoms |  | 25 |
| 4852525162 | Nonpolar Covalent Bond | a chemical bond in which two pairs of electrons are shared between two atoms |  | 26 |
| 4852531855 | Polar Covalent Bond | the shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive |  | 27 |
| 4852528770 | Valence | the bonding capacity of an atom generally equal to the number of unpaired electrons in the atom's outermost shell | 28 | |
| 4852530501 | Electronegativity | the attraction of an atom for the electrons of a covalent bond | 29 | |
| 4852534027 | Cation | an ion with a positive charge, produced by the loss of one or more electrons | 30 | |
| 4852535554 | Anion | a negatively charged ion | 31 | |
| 4852535555 | Ion | an atom that has gained or lost electrons, thus acquiring a charge | 32 | |
| 4852540315 | Ionic Bond | a chemical bond resulting from the attraction between oppositely charged ions | 33 | |
| 4852540316 | Ionic Compound | compounds resulting from the formation of ionic bonds; a salt | 34 | |
| 4852543538 | Hydrogen Bond | a type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule | 35 | |
| 4869017960 | Structural Formula | a type of molecular notation in which the constituent atoms are joined by lines representing covalent bonds | 36 | |
| 4869020113 | Molecular Formula | a type of molecular notation indicating only the quantity of the constituent atoms | 37 | |
| 4869037211 | van der Waals interactions | weak attractions between molecules or parts of molecules that are brought about by localized charge fluctuations | 38 | |
| 4869042990 | Chemical Reactions | a process leading to chemical changes in matter; involves the making and/or breaking of chemical bonds | 39 | |
| 4869067997 | Reactant | a starting material in a chemical reaction | 40 | |
| 4869069825 | Product | an ending material in a chemical reaction | 41 | |
| 4869071751 | Chemical Equilibrium | in a reverse chemical reaction, the point at which the rate of the forward reaction equals the rate of the reverse reaction | 42 |
