TOPIC 15 - Transition metals
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What is a transition element?
Why isn’t scandium a transition element?
Why isn’t zinc a transition element?
In what order of orbitals do transition elements loose electrons?
4s looses and gains electrons first, 3d looses/gains second.
Why do transition elements have various oxidation states?
Electrons in 4s and 3d orbitals have similar energy levels so similar amounts of energy are needed to create different ions.
What is the colour of V 2+ (aq)?
Violet
What is the colour of V 3+ (aq)?
Green
What is the colour of VO 2+ (aq)?
Blue
What is the colour of VO2 + (aq)?
Yellow
What is the colour of Cr 3+ (aq)?
Green (actually violet when surrounded by 6H2O but some ligands are usually substituted an so usually appears green)
What is the colour of Cr2O7 2- (aq)?
Orange
What is the colour of Mn 2+ (aq)?
Pale pink
What is the colour of MnO4 2- (aq)?
Green
What is the colour of MnO4 - (aq)?
Purple
What is the colour of Fe 2+ (aq)?
Pale green
What is the colour of Fe 3+ (aq)?
Yellow
What is the colour of Co 2+ (aq)?
Pink
What is the colour of Ni 2+ (aq)?
Green
What is the colour of Cu 2+ (aq)?
Blue
What is the colour of Ti 2+ (aq)?
Violet
What is the colour of Ti 3+ (aq)?
Purple
What is the colour of CrO4 2- (aq)?
Yellow
What is the colour of Cr 2+ (aq)?
Blue
What is a complex ion?
