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Transition elements

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

Card preview (24)

#1
Front (Question)

d-block element

Back (Answer)

An element with its highest energy e- in the d-subshell

#2
Front (Question)

transition metal

Back (Answer)

A d-block element which forms at least one ion with an incomplete d-subshell

#3
Front (Question)

What three types of reactions can transition elements undergo?

Back (Answer)

• ligand exchange • precipitate • redox

#4
Front (Question)

chemical properties of transition elements (4)

Back (Answer)

• colourful • good catalysts • variable oxidation states • complex ions with variety of ligands

#5
Front (Question)

physical properties of transition elements (5)

Back (Answer)

• ductile • malleable • high melting/boiling pt • hard/dense • sonorous

#6
Front (Question)

Why are transition elements good catalysts?

Back (Answer)

• variable oxidation states • provide a surface which can absorb reactants (form complex ions)

#7
Front (Question)

two examples of reactions which use transition metals as catalysts

Back (Answer)

• Ni (alkene –> alkane) • V2O5 Contact process (SO2 + O2 –> 2SO3)

#8
Front (Question)

ligand

Back (Answer)

A molecule or ion that can donate a pair of e- to the transition metal ion

#9
Front (Question)

complex ion

Back (Answer)

A transition metal bonded to ligands by coordinate bonds

#10
Front (Question)

coordinate number

Back (Answer)

Total number of coordinate bonds between a central metal ion and ligands

#11
Front (Question)

shape of complex ion with 4 coordinate bonds

Back (Answer)

• square planar (90°) • tetrahedral (109.5°)

#12
Front (Question)

shape of complex ion with 6 coordinate bonds

Back (Answer)

octahedral (90°)

#13
Front (Question)

bidentate ligands

Back (Answer)

ligands with two lone pairs of e-: - en - ethanedioate (2-)

#14
Front (Question)

hexadentate ligands

Back (Answer)

ligands with six lone pairs of e-: - edta (4-)

#15
Front (Question)

neutral ligands (monodentate)

Back (Answer)

• H2O • NH3

#16
Front (Question)

charged ligands

Back (Answer)

• Cl- • OH- • CN- • SCN-

#17
Front (Question)

which two transition metals have unusual e- configurations?

Back (Answer)

Cr and Cu

#18
Front (Question)

which d-block elements are not transition elements?

Back (Answer)

• Zn (Zn2+ has a full d-subshell) • SC (Sc3+ doesn’t have a d-subshell)

#19
Front (Question)

Cu2+ with NaOH(aq)

Back (Answer)

blue solution –> blue ppt Cu(OH)2(s) ppt insoluble in excess

#20
Front (Question)

Fe2+ with NaOH(aq)

Back (Answer)

pale green solution –> dark green ppt (goes brown on standing in air) Fe(OH)2(s) ppt insoluble in excess

#21
Front (Question)

Fe3+ with NaOH(aq)

Back (Answer)

pale yellow solution –> orange brown ppt Fe(OH)3(aq) ppt insoluble in excess

#22
Front (Question)

Mn2+ with NaOH(aq)

Back (Answer)

pale pink solution –> light brown ppt (darkens on standing in air) Mn(OH)2(s) ppt insoluble in excess

#23
Front (Question)

Cr3+ with NaOH(aq)

Back (Answer)

violet solution –> grey green ppt Cr(OH)3(s) ppt dissolves in excess to form a dark green solution [Cr(OH)6]3-(aq)

#24
Front (Question)

which ions react the same way with NH3(aq) as they do with NaOH(aq)

Back (Answer)

Fe2+ Fe3+ Mn2+