Terms : Hide Images
| 561083256 | acid | compound that tastes sour, has a low pH, turns litmus paper red, increases the conctration of hydrogen ions in wter, and reacts with metals to produce hydrogen gas | |
| 561083257 | alpha particles | positively charged nuclear particle, consisting of tow protons and two neutrons, that is given off by a radio active element | |
| 561083258 | atom | smallest particle of an element that exhibits all the properties of that element | |
| 561083259 | atomic mass unit | unid, defined as one twelfth the weight of an atom of carbon-12 in which atoic weight is expressed | |
| 561083260 | atomic weight | thae average weight of an atom of any element relative to the weight of an atom of carbon-12 | |
| 561083261 | Avogadros law | law which sttes that equal volumes of all gases at the same temperature and pressure contain the smae number of molecules | |
| 561083262 | base | a compound that tastes bitter feels slippery has a high pH, turns litmus paper blue and increases the concentration of hydroxid ions in water | |
| 561083263 | beta particle | a high-speed electron ejected from the nucleus of a radioactive atom | |
| 561083264 | binding energy | the energy that holds the protons and the neutrons in the nucleus of an atom together; the difference between the expected and the acutal mass of an atom | |
| 561083265 | boiling point | the temperature at which the vapor pressure of a liquid equals tha atmosheric pressure | |
| 561083266 | British thermal unit | the amound of heat required to rais the temperatur of 1 pound of water 1 degree fahrenheit | |
| 561083267 | calorie | the amount of heat requited to raise the temperature of 1 gram of water 1 degree celsius | |
| 561083268 | catalust | substance that increases the rate of a chemical reaction without any change to itself | |
| 561083269 | celsius scale | a temperature scale on which water freezes at 0 and boils at 100 | |
| 561083270 | chemical bond | for e by which atoms, ions, or groups of atoms are held together | |
| 561083271 | compound | a unique substance formed when two or more elements are chemically combined | |
| 561083272 | condensation | process by which a substance is changed from a gas to a liquid of solid | |
| 561083273 | conservation of mass-energy | matter and energy can never be created nor destroyed, only changed from one form to another. the total amount of matter and energy in the universe is constant | |
| 561083274 | covalent bond | chemical bond formed by the equal sharing of paired electrons | |
| 561083275 | crystal | solid in which the atoms, molecules, or ions are arranged in a definite, regular, three-dimensional pattern | |
| 561083276 | cyclotron | accelerator used to study the structue of the atom and properties of nuclei and subnucleic particle | |
| 561083277 | dehydration | removal of hydrogen and oxygen in the form of water from a compound | |
| 561083278 | density | mass of a substance per unit volume | |
| 561083279 | diffusion | process by which the atoms, molecule, or ions of two or more substanceces intermingle as a result of random, spontaneous motion | |
| 561083280 | distillation | process of heating a substance until it vaporizes and then collecting and condensing the gas, usually for the purpose of purification. | |
| 561083281 | elasticity | property of a body that enables it to recover its size and shape after deformation | |
| 561083282 | electron | a negetively charged subatomic particle | |
| 561083283 | element | a substance that is composed of only one kind of atom | |
| 561083284 | endothermic reaction | chemical reaction that absorms heat | |
| 561083285 | equation | a symboic expression of a chemical reaction | |
| 561083286 | evaporation | escape of molecules from the surface of liquids or solids | |
| 561083287 | exothermic reaction | a chemical reaction that gives off heat | |
| 561083288 | Fahrenheit scale | a temperature scale on which water freezes at 32 degrees and boils at 212 degrees | |
| 561083289 | fission | splitting of the nucleus of an atom, resulting in the release of enourmous amounts of energy | |
| 561083290 | fusion | union of the nuclei of atoms, resulting in the release of enormous amounts of energy | |
| 561083291 | gamma ray | a highspeed ray with no electrical charge that is emitted by a radioactive element | |
| 561083292 | half life | time required for half the atoms present in a radioactive substance to disintegrate | |
| 561083293 | heat of fusion | amount of heat required to convert 1 mole of a substance from a solid to hout change in temperature | |
| 561083294 | heat of vaporization | amount of heat required to convert 1 mole of a substance from a liquid to a gaseous state without a change in tempderature | |
| 561083295 | ion | an electrically charge atom of group of atoms | |
| 561083296 | ionic bond | a chemical bond formed by the transfer of electrons | |
| 561083297 | isotope | one of two or more species of atoms of the same element that differ in the number of neutrons in their nuclei and thus differ in atomic mass | |
| 561083298 | Kelvin scale | temperature scale, also known as the absolute temperature scaleo on which 0 degrees corresponds to the lowest temerature theoretically possible and on which water freezes at 273.15 degrees and boild at 373.15 degrees | |
| 561083299 | mass | the quantity of matter in a substance | |
| 561083300 | mass number | sum of the number of protons and neutrons in the nucleus of an atom | |
| 561083301 | matter | any substance that occupies space and has weight | |
| 561083302 | metal | any of a class of active chemical elements that are good conductors of heat and electricity and that generally hard, dense, malleable, ductile, and lustrous | |
| 561083303 | mixture | a substance containing two or more ingredients that retain their individual properties | |
| 561083304 | molecule | the smalles paret of an element or compound that exists under ordinary conditions and possesses all of the properties of the element or compound | |
| 561083305 | neutralization | reaction of an acid and a base that produces salt and water | |
| 561083306 | neutron | uncharged particle found in the nucleus of an atom | |
| 561083307 | noble gas | one of te relatively inactive elements (also called the inert or rare gases) at the extreme right of th periodic table | |
| 561083308 | nucleus | the dense, positively charged, central portion of an atom | |
| 561083309 | organic chemistry | the chemistry of carbon and its compounds | |
| 561083310 | oxidation | the process by which a substance loses electrons | |
| 561083311 | periodic table | the chart on which the chemical elements are arranced according to their physical and chemical properties | |
| 561083312 | pH | a measur of the concentration of a hydrogen ions in a solution | |
| 561083313 | precipitation | a reaction that results in the seperation of a solid from a solution or a suspension | |
| 561083314 | proton | positievly charged particle found in the nucleus of an atom | |
| 561083315 | radioactivity | the property possessed by those elements that emit alpa, beta, or gamma rays as a result of the spontaneous disintegration of the nuclei of their atoms | |
| 561083316 | reduction | the process by which a substance gains electrons | |
| 561083317 | saturated solution | a solution that contains as much solut as possible at a given temperature | |
| 561083318 | solute | the substance that is dissolved in a solution | |
| 561083319 | solution | a homogeneous mixture of two or more substances | |
| 561083320 | solvent | the substance that dissolves another substance in a solution | |
| 561083321 | specific gravity | the ratio of the density of a substance to the density of a standard substance, such as water or air | |
| 561083322 | specific heat | the amount of heat required to raise the temperature of 1 gram of a substance 1 degree celsius | |
| 561083323 | sublimation | the process of changing a solid directly into gas | |
| 561083324 | suspension | a heterogeneous mixture of undissoved solid particles in a liquid | |
| 561083325 | sunthesis | the buliding up of complex compounds from simpler compounds or elements | |
| 561083326 | valence | the mumber of electrons gained, lost, or shared by an atom in bonding with one or more other atoms to achieve a stable electron configuration | |
| 561083327 | vaporization | the process by which a substance is changed from a liquid or solid into a gas | |
| 561083328 | viscosity | a measure of a fluids resistance to flow |
