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8.4 Transition Elements
The transition elements are used extensively as catalysts. Which statement explains why they are such good catalysts?
Their oxidation state does not change.
They have a large surface area.
They can have variable oxidation states.
They form coloured compounds.
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Which entry in the table matches the transition elements?
| density | melting point | from coloured compounds |
A | high | low | no |
B | high | high | yes |
C | low | low | no |
D | low | high | yes |
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