Unit 2 - The Periodic Table (including Ionic Bonding).pdf

7/28/2019 Unit 2 - The Periodic Table (including Ionic Bonding).pdf

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by reference to the elements position.Data can be gathered from Periodic Tablewall charts, data books, online PeriodicTables and text books.

www.s-cool.co.uk/contents.aspclick on GCSE revision thenChemistry then choosetopic: The Periodic Table .Use the Quick learn section.

Online Periodic Tables:www.webelements.com

www.chemsoc.org/viselements

8.1g &8.2

a

Group propertiesProperties of Group I(trends in physical properties andreactions with water)

Suggested demonstration:Demo the reaction of lithium, sodium andpotassium with air by observing thetarnishing of the cut surface (if available,this can be shown using a digital

microscope and shown on a screen).

Demo the reactions with water, by addingsmall pieces to a trough containing waterand Universal Indicator solution (orphenolphthalein). Focus on the similaritiesbetween the reactions of each element,and the trend in reactivity.

Ask pupils to predict what will be observedwhen the more reactive elements areadded to water.Show video clips of the more reactivemetals in Group 1.(See resources)This is a good opportunity for students topractise making and predictingobservations.

This topic provides a goodopportunity to practise writingand balancing chemicalequations (Syllabus LearningObjective 3(d))

This is an opportunity toteach the gas test forhydrogen (Syllabus learningoutcome 1.3(c)) and the useof Universal Indicator (7.1(a))

Students need to learn thecrucial difference between anobservation (e.g. bubbles areseen) and an inference (e.g.hydrogen is made).

Video clips of the reactions ofGroup 1 elements with waterare available online atwww.chemsoc.org/viselements

http://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmclick on The Periodic Tablefor an introduction

OR

Group1 The Alkali Metals

balancing equations:www.creativechemistry.co.ukgo to Balancing Equationshttp://www.boc.com/education/index.htmltake the Formulae

Challenge
http://www.s-cool.co.uk/contents.asphttp://www.s-cool.co.uk/contents.asphttp://www.webelements.com/http://www.chemsoc.org/viselementshttp://www.chemsoc.org/viselementshttp://www.chemsoc.org/viselementshttp://www.chemsoc.org/viselementshttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.creativechemistry.co.uk/http://www.boc.com/education/index.htmlhttp://www.boc.com/education/index.htmlhttp://www.boc.com/education/index.htmlhttp://www.boc.com/education/index.htmlhttp://www.creativechemistry.co.uk/http://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.chemsoc.org/viselementshttp://www.chemsoc.org/viselementshttp://www.chemsoc.org/viselementshttp://www.chemsoc.org/viselementshttp://www.webelements.com/http://www.s-cool.co.uk/contents.asphttp://www.s-cool.co.uk/contents.asp


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b

d

Properties of Group VII

Properties of Group VII(trend in physical properties anddisplacement reactions)

The lack of reactivity of the noble gases

can be related to their electronicstructures.

One approach is for students to research

the physical properties (e.g. appearance,melting and boiling points etc) of thehalogens and enter the data into a table orspreadsheet.

Students test each other by deleting/hidinginformation and trying to predict themissing properties by considering theposition of the element in the Group.

The displacement reactions can be carriedout as a demo or experiment. A few dropsof hexane can be used to distinguishbetween iodine (purple in hexane) frombromine (orange).

Students can check their understanding byusing element (fluorine, chlorine etc.) and

compound (aqueous potassium fluoride,aqueous potassium chloride etc.) cards.Students take a card from each pile andsay whether or not a reaction will happen.More able students can be asked to predictobservations and equations for eachreaction.

Students can research the extremely low

b.pts. of the noble gases, the fact that theyare monatomic gases and their uses usingthe interactive Periodic Tables.

Ideas about ionic bonding(see 2.4 below) can betaught alongside teachingabout Groups I and VII.

This is an opportunity toteach the gas test forchlorine (Syllabus learningoutcome 1.3(c))

By the end of the course,students should be able todiscuss displacementreactions in terms ofoxidation numbers, electrontransfer and REDOX((Syllabus LearningObjectives 6.2 (a) to (c)). If

this unit is taught early in thecourse, it is recommendedthat these ideas are notintroduced here, but are dealtwith as revision later.

www.chemsoc.org/networks/learnnet/classic_exp.htmLook at experiment 19

http://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htm

www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmClick on Group 7TheHalogens

www.wpbschoolhouse.btinter

net.co.uk/page10/page10.htmClick on Group 0The NobleGaseshttp://www.boc.com/education/index.htmllook up the uses of the noblegases by going into theGases Hall of Fame
http://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.boc.com/education/index.htmlhttp://www.boc.com/education/index.htmlhttp://www.boc.com/education/index.htmlhttp://www.boc.com/education/index.htmlhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page03/The_Halogens.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htm


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e Students can then test the properties of

some ionically bonded compounds e.g.solubility in water, electrical conductivity oftheir crystals and solutions, whethercrystals melt on heating. Students canthen be given two white solids (e.g. sodiumchloride and powdered wax) and can beasked to identify which is ionically bonded.

Documents

Unit 2 - The Periodic Table (including Ionic Bonding).pdf