677778
Frage 1
Frage
A transitional element is a d block element that forms at least one ion with an incomplete d sub-shell.
Antworten
- True
- False
Frage 2
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the d-block elements would have filled their 4s orbitals before their 3d orbitals( the 4s sub-shell has a lower energy than the 3d sub-shell ).
Antworten
- True
- False
Frage 3
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chromium which is a transition metal has its 3d and 4s orbitals half-filled(4s1 3d5)
Antworten
- True
- False
Frage 4
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copper only one electron is in the 4s orbital but the 3d orbital is full
Antworten
- True
- False
Frage 5
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To form positive ions transition element atoms loose electrons from their 4s sub-shell before their 3d subshell.
Antworten
- True
- False
Frage 6
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Properties specific to transition metal compounds in result to of their electron configuration(partially filled d-orbitals):
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exist as giant metallic lattices containing delocalised electrons which move to conduct electricity
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shiny in appearance
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catalyse chemical reactions
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high density and melting point and boiling point
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form coloured compounds
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form compounds in which they have different oxidation states
Frage 7
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transition metals from titanium to copper don't form the +2 oxidation state
Antworten
- True
- False
Frage 8
Frage
KMnO4 is a purple solid used as a oxidising agent in redox titrations
Antworten
- True
- False
Frage 9
Frage
important chemical reactions that are catalysed by transition metals or their compounds
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Haber process
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polymerisation
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Hydrogenation of alkenes
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acid hydrolysis
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Contact process
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Decomposition of hydrogen peroxide
Frage 10
Frage
All ligands are neutral
Antworten
- True
- False
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