ch3_ws4

Cambridge International AS and A Level Chemistry Original material © Cambridge University Press 2011 1 Worksheet 3.4 Electronic structure 1 a Copy and complete the table below to show the electronic configur ation of each of the follo wing elements. [20] 1s 2s 2 p 2p 2p 3s 3p 3p 3p 4s 3d 3d 3d 3d 3d 4p 4p 4p He Be C N F Ne Mg Cl Ca V b Write the e lectron configuratio n of e ach element above using 1s 2 notation. [10] 2 a Define the term first ionisation energy. [3] b Draw a sketch graph to show how the first ionisati on energy varies across Period 3 from sodium to argon. [7] c Explain the shape of the graph you have drawn. [10] 3 Draw the following: a an s orbital [1] b a p orbital. [2]

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Worksheet 3.4

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CambridgeInternationalASandALevelChemistry OriginalmaterialCambridgeUniversityPress2011 1

Worksheet3.4

Electronicstructure

1 a Copyandcompletethetablebelow toshowtheelectronicconfigurationofeachofthefollowingelements. [20]

1s 2s 2p 2p 2p 3s 3p 3p 3p 4s 3d 3d 3d 3d 3d 4p 4p 4p

He

Be

C

N

F

Ne

Mg

Cl

Ca

V

b Write theelectronconfigurationofeachelementaboveusing 1s2notation. [10]

2 a Definetheterm firstionisationenergy. [3]b Drawasketchgraph toshowhowthefirstionisationenergyvariesacrossPeriod3

fromsodiumtoargon. [7]c Explaintheshape ofthegraphyouhavedrawn. [10]

3 Drawthefollowing:a ansorbital [1]b ap orbital. [2]