Download Compound vs Element chart

Name______________________Date____________
Elements,Compounds&Mixtures
Part1:Readthefollowinginformationonelements,compoundsandmixtures.
CompoundversusElementcomparisonchart
Compound
Element
Meaning
Acompoundcontainsatomsofdifferentelements
chemicallycombinedtogetherinafixedratio.
Anelementisapurechemicalsubstance
madeofsametypeofatom.
Distinguishing
Feature
Compoundscontaindifferentelementsinafixed
ratioarrangedinadefinedmannerthrough
chemicalbonds.
Elementsaredistinguishedbytheiratomic
number(numberofprotonsintheir
nucleus).
Abilityto
Breakdown
Acompoundcanbeseparatedintosimpler
substancesbychemicalmethods/reactions.
Elementscannotbebrokendowninto
simplersubstancesbychemicalreactions.
Types
Thelistofcompoundsisendless.
Thereareabout117elementsthathavebeen
observed.Canbeclassifiedasmetal,nonmetalormetalloid.
Representation
Acompoundisrepresentedusingaformula.
Anelementisrepresentedusingsymbols.
Examples
Water(H2O),Sodiumchloride(NaCl),Sodium
Iron,copper,silver,gold,nickeletc.
bicarbonate(NaHCO3)etc.
Note that a compound:
• consists of atoms of two or more different elements bound together,
• can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
• has properties that are different from its component elements, and
• always contains the same ratio of its component atoms.
Note that an element:
• consists of only one kind of atom,
• cannot be broken down into a simpler type of matter by either physical or chemical means, and
• can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen).
A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound together.
*Note that the two nitrogen atoms which comprise a nitrogen molecule move as a unit.
Note that a mixture:
• consists of two or more different elements and/or compounds physically intermingled,
• can be separated into its components by physical means, and
• often retains many of the properties of its components.
Part2:FillintheBlanks
Elements:
• Apuresubstancecontainingonlyonekindof____________.
• Anelementisalwaysuniformallthewaythrough(homogeneous).
• Anelement_____________beseparatedintosimplermaterials(exceptduringnuclearreactions).
• Over100existingelementsarelistedandclassifiedonthe____________________.
Compounds:
• Apuresubstancecontainingtwoormorekindsof_______________.
• Theatomsare_________________combinedinsomeway.Oftentimes(butnotalways)theycome
togethertoformgroupsofatomscalledmolecules.
• Acompoundisalwayshomogeneous(uniform).
• Compounds___________________beseparatedbyphysicalmeans.Separatingacompoundrequiresa
chemicalreaction.
• Thepropertiesofacompoundareusuallydifferentthanthepropertiesoftheelementsitcontains.
Mixtures:
• Twoormore________________or_________________NOTchemicallycombined.
• Noreactionbetweensubstances.
• Mixturescanbeuniform(called________________________)andareknownassolutions.
• Mixturescanalsobenon-uniform(called________________________).
• Mixturescanbeseparatedintotheircomponentsbychemicalorphysicalmeans.
• Thepropertiesofamixturearesimilartothepropertiesofitscomponents.
Part3:Classifyeachofthefollowingaselements(E),compounds(C)orMixtures(M).WritetheletterX
ifitisnoneofthese.
___Diamond (C) ___Sugar(C6H12O6) ___Milk
___Iron(Fe)
___Air ___SulfuricAcid(H2SO4)
___Gasoline ___Electricity
___Krypton(K)
___Bismuth(Bi)
___Uranium(U)
___Popcorn
___Water(H2O)
___Alcohol(CH3OH) ___PailofGarbage ___Adog
___Ammonia(NH3) ___Salt(NaCl)
___Energy
___Gold(Au)
___Wood
___Bronze ___Ink ___Pizza
___DryIce(CO2)
___BakingSoda(NaHCO3) ___Titanium(Ti)
___Concrete
Part4:Matcheachdiagramwithitscorrectdescription.Diagramswillbeusedonce.
A
B C
D
E
____1.PureElement–onlyonetypeofatompresent.
____2.Mixtureoftwoelements–twotypesofuncombinedatomspresent.
____3.Purecompound–onlyonetypeofcompoundpresent.
____4.Mixtureoftwocompounds–twotypesofcompoundspresent.
____5.Mixtureofacompoundandanelement.