Basics of transition metals Flashcards
where r transition metals from?
O blah
nah they from d block
yay
great banter
(crying inside) :)
transition metal definition?
a metal that can form one or more stable ions with a partially filled d sub-level.
what is special about “Cr” electron configuration (box diagram)?
Only one arrow in 4s
and single arrows in the five 3d boxes
what is special about “Cu” electron configuration (box diagram)?
only one arrow in 4s
and all five 3d boxes have 2 arrows
What causes special chemical properties in transition metals?
Incomplete d sub- level.
Which elements in d block are NOT transition metals
Scandium and zinc
this is because Sc3+ has a EMPTY d orbital
and Zn2+ has a FULL d orbital
(to be classified as a transition mental orbital has to be “partially” full)
What are the 3 physical properties of transition metals?
1) High density
2) High melting and boiling point
3) Their ionic radii are similar
4 chemical properties of transition metals?
1) Variable oxidation states
2) good catalysts
3) form coloured ions
4) form complex ions
What is the colour of MnO4- (+7)
purple
What is the colour of Cr2O7 2- (+6)
Orange
What is the colour of VO2+ (+5)
Yellow
What is the colour of VO 2+ (+4)
Blue
What is the colour of V3+ (+3)
Green
What is the colour of Cr3+ (+3)
Violet OR Green
Violet: When Cr3+ is surrounded by 6 water ligands
Green: When the water ligands are substituted
What is the colour of Fe3+ (+3)
purple OR yellow
purple; when Fe3+ surrounded by 6 water ligands
yellow: Due to hydrolysis reaction
