Karteikarten
Module 5: Chapter 24.1
Karten in diesem Stapel (9)
- 1Where are the d-block elements located? Why are d-block elements called d-block elements?-They are located between group 2 and group 3
-This is because as you go across the period the 3d sub-shell has the highest energy and electrons are added to the 3d orbitals - 2What are the properties of d-block elements and give examples for each property.-They can exists in more than 1 oxidation state
-They form coloured ions/compounds
-The elements and their compounds can act as catalyst (e.g Acidified Potassium Dichromate) - 3What is electron confiuration of an atom or ion?-Electron configuration of an atom or ion shows the order of filling in which electrons occupy orbitals, they occupy orbitals singularly in order of increasing energy levels.
- 4Write down the electron configurations of all d-block elements from Scandium to Zinc
- 5Why do copper and chromium not follow the trends in the d block period?-This is due to stability, because orbitals fill up singularly before pairing up therefore they will fill up the 4s2 orbitals first before they start to pair up in the d subshell, by doing this they are more stable.
- 6Which orbital is emptied first when forming an ion? Which orbital fills first when forming an atom?-The 4s orbital empties first before the 3d orbitals, this is because when they are full they have a higher energy level than the 3d
-The 4s orbital fills first before the 3d orbitals, this is because when they are empty they have lower energy levels than the 3d - 7What is a transition element? Which d-block elements are not transition elements?-A transition element is a d-block element that can form atleast one stable ion with an incomplete d sub-shell.
(E.g Sc3+ Zn2+)
-Scandium and Zinc because they cannot for atleast 1 stable ion - 8Ask balinski-How would you explain the order of filling if asked?
-How would we explain why Copper and Chronium dont follow the trends
-How do we explain why the 4s2 orbital fills/empties before the 3d orbital - 9—
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- Karteikarten am Module 5: Chapter 24.1 , erstellt von BUKDABOSS . am 07/02/2019.
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