Objec&ve:
• Todaywewill…
• WhiteboardPrac&cewithAtoms
• POGILonWater
• Handbackyourtermitelabs
• Sothatwecan…
• Defineatom,molecule,ionic&covalentbonding.
• Usetheperiodtabletodraw&labelanatom.
• Compareandcontrastionicandcovalentbonding.
• Useourknowledgeofmoleculesandbondingtodraw
andlabelawatermolecule.
BellWork:
1)  Pleaseopentoyournotesfromlastclass
(2-3).
2)  AHeliumatomhas2protons,2neutrons
and2electrons.Pleasedrawthisatomona
whiteboard.
HeliumAtom:
Atoms
Atoms are the
smallest units
of matter.
WhiteboardPrac&ce:
AnOxygenatomhas8protons,8neutronsand
8electrons.Pleasedrawanoxygenatom.
PeriodicTable:
Achartthatorganizesallthedifferenttypesofatoms!
PeriodicTable:
WhiteboardPrac&ce:
Thisistheinforma&onaboutNitrogenthatison
theperiodictable.Howmanyprotonsdoes
Nitrogenhave?
WhiteboardPrac&ce:
Thisistheinforma&onaboutSodiumthatison
theperiodictable.Howmanyprotonsdoes
sodiumhave?Howmanyelectrons?
Whiteboard Practice:
Thisistheinforma&onforthe
elementberylliumonthe
periodictable.
Pleasedraw1atomof
beryllium.Labelthepartsof
theatomandtheircharge.
WhiteboardPrac&ce:
•  Whichpartoftheatomdetermineshowitwill
bondwithotheratoms?
Bonding:
Atoms stick together (bond) when their electrons
interact! There are 2 main types of bonds:
“Ionic” bond. One atom gives
away electrons to the other.
“Covalent” bond. Atoms share
electrons with each other.
Molecules:
Molecule=2ormoreatomsbondedtogether
covalently
WaterMolecule
PutItAllTogether!
Waterisamoleculemadeupof1oxygenatomand2
hydrogenatomsthatarecovalentlybonded.Given
theinforma&onbelow,pleasedraw1moleculeof
water.(Hint:Startbydrawinganoxygenatom.)
(H has NO Neutrons)
(O has 8 Neutrons)
StructureofaWaterMolecule:
TrueorFalse?
Allknownlifeformsdependonwater.
TRUE!
Waterhasunique
proper&esthatmake
itpossibleforlifeto
existonEarth.
POGIL:
•  Inyourtablegroup,pleasedeterminewhoisthe
oldestandwhoistheyoungestJ
•  Theoldestpersonisthespokespersonforthe
group.He/shewillaskandanswerques&onsabout
eachsec&onwhenthegroupisreadyforastamp.
•  Theyoungestpersonisqualitycontrolforthe
group.He/sheisresponsibleformakingsurethat
everyone’snotesmatchthespokesperson’snotes.
•  Raiseyourhandwhenyoureacha“STAMP”box.
Youmustgetastampbeforemovingon.
TermiteLabs:
Like, totally
awesome!
ThreeTakeawaysforFutureLabs:
1) Includeonlyrelevantbackground
knowledge.
2) MakeyourdataquanBtaBve
(number-based)wheneverpossible.
3) Argueyourclaimlikealawyer!
1)Includeonlyrelevantbackground
knowledge.
Whichfactismostrelevanttoourlab?
A)Termitescause1.2billiondollarsof
propertydamageintheUSannually.
B)Termiteseatwood.
C)Termiteshavedifferentroleswithintheir
colony.
D)Termitesusescent,notvision,tofollow
trails.
2) Make your data quantitative
(number-based) whenever possible.
“Thetermiteseemedtobeafractedtotheblueink
fromthebeginning.Whenwesetthetermitefreeto
movearoundthepaper,itimmediatelywentforthe
bluepapermatepen.Butagerfurtherinves&ga&on,
itstatedtowanderawayfromtheblueinkandwalk
towardstheredbicink.S&llfavoringbluethemost,it
didseemtohaveacertainlikingforthered.”
(ThisisNON-quanBtaBveevidence.)
2) Make your data quantitative
(number-based) whenever possible.
“Weplacedthetermiteonthepaperandwhenever
hesteppedonashape,we&medhowlonghewason
itfor.Wefoundthatthetermitestayedonthered
trianglefor5.38seconds,ontheredsquarefor15.84
seconds,andontheredcirclefor3seconds.The
termitewasonthesquarefor428%longerthanthe
circle,soweconcludethatshapedoesaffectthe
termite’sbehavior.”
(ThisisQUANTITATIVEevidence.)
3)Argueyourclaimlikealawyer!
•  IncludeALLrelevantdata.
•  Connectthedots
–  “Thismeans…”
–  “Thisleadsustoinfer…”
–  “Thishelpsustounderstand…”
Homework:
Pleasefinishyour“Proper&esofWater”
POGILbythebeginningofclasstomorrow.
(Itmustbecomplete
beforeyoucanbegin
tomorrow’slab!)