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Chemistry - Paper 1
Transition Metals
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Created by
Frances Beaumont
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Where are transition metals found on the periodic table?
The middle.
How do the melting points, densities, strengths and hardness of transition metals compare to those of group 1 metals?
Higher (transition metals)
How does the reactivity of
transition
metals with oxygen, halogens and water compare to that of group 1 metals?
Lower
(transition metals)
What are transition metals used for?
Catalysts
, alloys,
magnets
Give the distinctive properties of transition metal compounds.
Form ions with different charges and coloured compounds.
How big are nanoparticles?
1-100
nanometers
How are nanomaterials different from bulk materials?
Higher surface area to volume ratio.
What is the relationship between side length and surface-area-to- volume ratio?
As side length
decreases
by a factor of
ten
, the surface area-volume ratio increases by a factor of 10
What are nanoparticles used for?
Used in healthcare, electronics, cosmetics and catalysts
How big are fine particles?
100-2500
nm
How big are coarse particles?
2.5
x 10 to the power of -6 to 1 x 10 to the power of
-5
Transition metal properties compared to group 1 properties
transition:
-more dense
-
harder
-stronger
-higher
melting points
-less
reactive
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