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- 1MatterAnything that has mass and occupies space.
- 2WHMISWorkplace Hazardous Materials Information System; a system of easy-to-see warning symbols on hazardous materials
- 3Statesrefers to the three common states in which matter can exist: solid, liquid, and gas
- 4Meltingchange of state from solid to liquid
- 5Evaporationchange of a state from liquid to gas
- 6Condensationchange of a state from gas to liquid
- 7Freezingchange of a state from liquid to solid
- 8Sublimationchange of a state from solid to gas or gas to solid
- 9Depositionchange of a state from gas to solid
- 10Propertiescharacteristics that describe a particular substance (e.g. colour, lustre,melting point, crystal shape, solubility, ductility)
- 11Physical propertiesproperties that describe the physical appearance and composition of a substance
- 12Physical changechange in the appearance of a substance that does not change the composition
- 13Malleabledescription of a substance that can be pounded or rolled into sheets
- 14Ductiledescription of a solid that can be stretched into a long wire
- 15Solubilitymass of a substance that can dissolve in a given amount of solvent to form a saturated solution at a given temperature
- 16Densityamount of mass in a given volume of a substance
- 17Conductivityability of a substance to conduct electricity or heat
- 18Chemical propertydescription of how a substance interacts with other substances, such as acids; chemical properties are observable only when a chemical change occurs
- 19Chemical changechange that results when two or more substances react to create a different substance or substances; the new substances have completely different properties from the original ones
- 20Pure substancesubstance made of only one kind of matter which has a unique set of properties
- 21Elementpure substance that cannot be broken down into other substances; substance made up of only one type of atom
- 22Periodic tablea table in which the elements are organized by their physical and chemical properties
- 23Compoundchemical combination of two or more elements in a specific ratio
- 24Mixturecombination o pure substances; unlike a compound, the components of a mixture do not combine chemically and are not always in the same ratio
- 25Mechanical mixtureheterogenous mixture; mixture in which the different substances that make up the mixture are visible
- 26Solutionhomogeneous mixture; mixture of two or more pure substances that looks like one substance
- 27Aqueous solutiona solution in which water is the solvent
- 28Suspensioncloudy mixture in which tiny particles of one substance are held within another, and the particles can be separated out
- 29Colloidcloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated out from the other substance
- 30Atomthe smallest part of an element that is representative of that element; a neutral particle made up of a nucleus containing protons and neutrons and in which the number of electrons equals the number of protons
- 31Electronsinvisible negatively charged particles that orbit the nucleus of an atom
- 32Nucleuspositively charged centre of an atom; contains protons and neutrons
- 33Electron shellsorbits of electrons around the nucleus of an atom
- 34Protonspositively charged particle in the nucleus of an atom
- 35Neutronsneutral particle in the nucleus of an atom
- 36Atomic massmass of an atom of an element calculated from the total number of protons, neutrons, and electrons of that atom; measured in atomic mass units
- 37Periodhorizontal row of elements in the periodic table
- 38Groupvertical column of elements in the periodic table; elements in a family all have similar chemical properties; also known as family
- 39Atomic numbernumber of protons in the nucleus of one atom of an element
- 40Atomic mass unitmeasure of atomic mass
- 41Mass numberthe sum of the number of protons and neutrons in an atom
- 42Metalsshiny, malleable, ductile elements that conduct electricity
- 43Non-metalsdull, brittle elements that don't conduct electricity
- 44Metalloidselement that has both metallic and non-metallic properties
- 45Alkali metalsgroup 1 elements in the periodic table, not including hydrogen; the most reactive of the metals
- 46Alkaline-earth metalsgroup 2 elements in the periodic table; their reactivity is not as strong as that of alkali metals
- 47Halogensgroup 17 elements in the periodic table; the most reactive non-metals
- 48Noble gasesgroup 18 elements in the periodic table; the most stable and unreactive metals
- 49Chemical formulacombination of symbols that represent a compound; the formula identifies the elements in the compound and the amount of each element
- 50Ionic compoundpure substance formed when at least one metal and one non-metal combine
- 51Ionsatom that has become electrically charged because it has lost or gained electrons; a positive ion is an atom that has gained one or more electrons
- 52Polyatomic ionsgroup of atoms acting as one
- 53Moleculegroup of atoms joined by covalent bonds
- 54Molecular compoundpure substance formed when non-metals combine
- 55Chemical reactiona reaction that takes place when two or more substances react to form new substances
- 56Reactantsubstance that reacts with another substance or substances in a chemical reaction to create new substances with different properties
- 57Productnew substance produced in a chemical reaction between reactants
- 58Exothermic reactionf
- 59Endothermic reactiong
- 60Comustionh
- 61Corrosioni
- 62Cellular respirationj
- 63Law of conservation of massk
- 64Closed systeml
- 65Open systemm
- 66Catalystsn
- 67Enzymeso
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- Fichas sobre Sin título, creado por Amna Khan el 21/05/2018.
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- Amna Khan
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