Lesson template
- 1. LESSON TEMPLATE Name ofTrainee: V.S. Vimal Nayan STD : IX Name OfSchool : GVHSS. Veeranakavu STR : Subject: Chemistry Duration : 30 minutes Unit: PeriodicTable andThe chemical Bond Topic : Relative Atomicmass CURRICULAR STATEMENT Pupil will have conceptual andfactual knowledgeaboutrelativeatomicmassbydiscussionandobservation. CONTENT ANALYSIS TERMS: JohnDalton,Mass, atomictheory,relative mass, hydrogen FACTS: 1) John DaltonFormulatedatomicTheory 2) atom hasfixedmass. 3) Size of atom cannotbe determineddirectlydue toitssmall size 4) Usingrelative mass,massof small objectcan be determined. 5) Hydrogenissmallestatom 6) Hydrogenhassmallestatomicsize 7) Mass of Oxygenis16 timesmore thanmass of one hydrogenatom CONCEPT The methodof expressingmassof anobjectincomparisonwithanotherobjectorspecificportionof itiscalledas‘Relative AtomicMass’.The mass of atom expressedinthismanneriscalledas‘Relative atomicmass’. LEARNING OUTCOMES Remember: Pupil will recall andrecognize listof differentrelative atomicmass. Understand: Pupil will interpret,compare andexplainthe massesof differentelements. Apply : Pupil will aplyfactual andconceptual knowledgeaboutmassesof elements Analyse : Pupil will atomicmassesof differentelements. Evaluate : Pupil willformulate judgementbasedonhypothesisthatelementshave differentatomicmass. Create : Pupil will create achart of elementsandtheirrelative atomicmass. Pre- requisite: Pupilshave anideaaboutelements,mass,classificationof elementsasmetalsandnon- metals Formative Evaluation Technique : Discussion,questioning,chartpreparation,tabletetc.
- 2. RESPONSES CLASSROOM INTERACTION PROCEDURE EXPECTED ACTUAL PosingThe Problem: Teachershowsthe picture of Lavosiere Pupilsobservethe picture To studentsandasks todiscussthe followingquestions carefullyanddiscussthe questions DiscussionPoints 1) Name thisgreat scientist. Lavosiere 2) How didLavosiere Classifiedelements? Intometalsand nonmetals 3) Do metalsandnon metalshave differentproperties? Yes Consolidation 1) Name of thisscientistis‘Antoine Lavosiere pupilslistenand 2) Lavosiere classifiedelementsintometalsandNonmetals understandcarefully 3) yes,propertiesof metalsandnonmetalsare different ,, Activity – 1 Teachershowsthe picture of JohnDaltonand asksstudentsto Pupilsobserveitcarefully Discussthe followingquestions. DiscussionPoints 1) Couldyou name thisscientist? JohnDalton 2) What was Dalton’satomicTheory? Pupilsdiscussingroups 3) Can youdetermine atomicmassbyweighing? No Consolidation 1) ThisscientistisjohnDalton pupilslistenand 2) Dalton’sAtomicTheorysaysthat, ‘everyelementhasatom understandcarefully .Everyatom has small butdefiniteatomicmass. ,, 3) Thisatomic masscannot be determinedbysimplyweighing ,, Activity – 2 Teacherask the studentstomeasure the lengthof table by Pupil performasteachersaid assumingbooklengthtobe unitlengthanddiscussfollowing and discussquestions questions ,,
- 3. DiscussionPoints 1) Is it possible tomeasure lengthof otherobjectsusingbook? Yes 2) If so,whetheritispossible tomeasure massof small objects Yes usingrelative mass? 3) What do we call thismethod? Pupilsdiscussingroup 4) Is it possible tomeasure massof atombythismethod? Yes Consolidation Teacherconsolidatesall answerandsaysthat. “The methodof Pupilslistenandunderstand expressingmassof an object comparisontomassof other carefully objectiscalledRelative Mass.The massof atom determinedby ,, thismethodiscalledasRelative AtomicMass B.B ,, Activity – 3 Teachershowsthe picture of model of relative atomicmass. Pupilssee the picture anddiscuss Thenasks themto answerthe followingquestions. Questions DiscussionPoints 1) Which isthe smallestmassedatom?Howmuch? Hydrogem;mass= 1 2) In case of elementsmassof atomcan be determinedby___ Relative massof Hydrogen 3) Accordingtothiswhat isthe mass of oxygenatom? 16 Consolidation 1) Considering hydrogenatommasstobe unit,mass of other Pupilslistenandunderstand Atomcan be determined.Thiswasdone inoldendays carefully 2) Mass of oxygenis16 timesmore thanmassone Hydrogen ,, Atom 3) Similarly carbonhasmass12, nitrogenhasmass 14, sodium ,, hasmass 23 and magnesiumhasmass24 B.B. 4) Hydrogenisthe atom withsmallestmass ,, 5) The massof one hydrogenatomis1 ,,
- 4. CLOSURE Match the followingcolumns Column A ColumnB Hydrogen 24 Oxygen 23 Nitrogen 12 Sodium 14 Magnesium 1 Carbon 16 Date: BLACKBOARD SUMMARY STD : IX CHEMISTRY STR : Periodic Table and The Chemical Bond RELATIVE ATOMIC MASS JohnDalton - atom – atomic theory Hydrogen – atomicmass -1 Mass of carbon -12 Mass of Sodium – 23 REVIEW AND FOLLOW UP ACTIVITY I. 1) Define relative atomicmass 2) What isrelative atomicmassof sodiumandCarbon? II. 1) Create a chart of differentelementandtheiratomicmass. 2) Create a detailednote onDalton’s Atomictheory.