transition elements

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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Front (Question)

what is the electronic configuration of Cu

Back (Answer)

1S2 2S2 2P6 3S2 3P6 4S1 3D10

Front (Question)

what is the electronic configuration of Cr

Back (Answer)

1S2 2S2 2P6 3S2 3P6 4S1 3D5

Front (Question)

What is the rule when determining the electronic configuration of a transition metal ion

Back (Answer)

electrons are lost from the 4s before the 3d when d-block elements form ions.

Front (Question)

define transition elements

Back (Answer)

d-block elements that form one or more stable ion with a partially filled d-subshell.

Front (Question)

what are the three properties of transition metals

Back (Answer)

can exist in more than one oxidation state form coloured ions possess catalytic behaviour

Front (Question)

define a complex ion

Back (Answer)

a transition element ion surrounded by ligands

Front (Question)

define a ligand

Back (Answer)

species that donates a pair of electrons to a transition metal ion to form a co-ordinate bond

Front (Question)

define a co-ordination number

Back (Answer)

the total number of co-ordinate bonds being made to a transition element ion

Front (Question)

define a monodentate ligand

Back (Answer)

donates one lone pair of electrons to form one co-ordinate bond

#10

Front (Question)

define a bidentate ligand

Back (Answer)

donates two pairs of electrons to a transition metal ion to form two co-ordinate bonds

#11

Front (Question)

what is the bond angle on square planar

Back (Answer)

#12

Front (Question)

define an optical isomer

Back (Answer)

non-super imposable mirror image

#13

Front (Question)

what is the test for transition elements

Back (Answer)

NaOH (precipitation reaction) or react with NH3 which produces OH- in solution

#14

Front (Question)

what is the colour of the solution before NaOH is added, and the colour of the precipitate after NaOH has been added? Cu2+ + 2OH- —-> Cu(OH)2 (s)

Back (Answer)

solution - blue precipitate - blue

#15

Front (Question)

what is the colour of the solution before NaOH is added, and the colour of the precipitate after NaOH has been added? Fe2+ + 2OH- —-> Fe(OH)2 (s)

Back (Answer)

solution - pale green precipitate - green

#16

Front (Question)

what is the colour of the solution before NaOH is added, and the colour of the precipitate after NaOH has been added? Fe3+ +3OH- ——> Fe(OH)3 (s)

Back (Answer)

solution - yellow precipitate - orange/brown

#17

Front (Question)

what is the colour of the solution before NaOH is added, and the colour of the precipitate after NaOH has been added? Mn2+ + 2OH- —–> Mn(OH)2 (s)

Back (Answer)

solution - pale pink precipitate - pale brown

#18

Front (Question)

what is the colour of the solution before NaOH is added, and the colour of the precipitate after NaOH has been added? Cr3+ + 3OH- —>Cr(OH)3 (s) what is the colour produced when excess NaOH is added

Back (Answer)

solution - violet precipitate - grey-green excess - dark green solution [cr(OH)6] 3-

#19

Front (Question)

what is the colour change that occurs when excess NH3 is added to [Cu(H2O)6] 2+

Back (Answer)

blue solution —> deep blue solution

#20

Front (Question)

what is the colour change when excess NH3 is added to [Cr(h2O)6]

Back (Answer)

violet solution —-> purple solution

#21

Front (Question)

what is the colour change that occurs when [Cu(h2O)6] reacts with chlorine ions in a ligand substiution reaction

Back (Answer)

blue solution —-> yellow solution

#22

Front (Question)

haemoglobin is an octahedral complex with an Fe 2+ at the centre, what is the name of the complex when O2 is bound

Back (Answer)

oxyhaemoglobin (HbO)

#23

Front (Question)

haemoglobin is an octahedral complex with an Fe 2+ at the centre, what is the name of the complex when CO is bound

Back (Answer)

carboxyhaemoglobin (HbCO)

#24

Front (Question)

why is CO deadly

Back (Answer)

CO binds irreversibly to haemoglobin to form HbCO, which prevents the transport of O2 around the body