8.4 Transition Elements
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21. List four general physical and chemical properties that characterize transition elements as metals.
- High densities
- High melting points
- Form colored chemical compounds
- Act efficiently as catalysts (as elements or in compounds)
22. What unique chemical characteristic do transition elements have regarding their ions?
They exhibit variable oxidation states, allowing individual elements to form distinct ions (e.g., iron(II) (Fe2+) vs. iron(III) (Fe3+), or copper(I) (Cu+) vs. copper(II) (Cu2+)).