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Questions tagged [transition-metals]

For questions about the characteristic physical properties, chemical reactions, etc. of d-block elements, group 3-12, or their compounds. Do not use this tag if your questions is about general properties of metals, use [metal] instead. Also see [rare-earth-elements].

From the IUPAC Red Book 2005, IR-3.5:

For example, the elements of groups 3–12 are the d-block elements. These elements are also commonly referred to as the transition elements, though the elements of group 12 are not always included; [...]

These metals, like all metals, are ductile and have the capability to conduct electricity as well as heat.

577 questions
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What wavelength of light is released when an electron drops an energy level in complexes?

I know that the color of transition metals is related to the splitting of the d-orbitals. Only a certain wavelength is absorbed in the promotion of electron to a higher d-orbital and therefore the remaining colors are interpreted as a certain color.…
kyczawon
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Why is mercury liquid?

Why is mercury the only metal that is liquid at room temperature? Note: I am a high school student and would appreciate an answer, if possible, suited for my level of understanding. Thank you.
Lewis
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Can we goldify metals?

I've read in some book that one of the old chemists was able to transform cheap metals into gold. I know that gold is an element (Au) so we can't transform a metal into Au. But as I read further it says that the chemist doesn't actually transform…
Mark
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Why do transition metals tend to form positive ions instead of negative ions?

I have learnt that elements on the left-hand side of the periodic table such as sodium and magnesium prefer to lose electrons to form a cation because this requires less energy to obtain a stable octet, and vice-versa for the right-hand side of the…
k--
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Metal-Ligand-Complex and bond directions: What defines coordinate system of the complex ion?

I have a question concerning metal ligand complexes. In every chemistry text book I have read which treats metal ligand complexes, following situation is discussed: When 6 ligands (in octahedral coordination) approaches a metal ion with d-orbitals,…
physicist
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What are the magnetic properties of [Ni(S2C2Ph2)2]^z's 3 oxidation states?

I was doing some research on Wikipedia and I came across the article on non-innocent ligands. It talked about the chemical $$[\ce{Ni(S_2C_2Ph_2)_2}]^z$$ as an example. It mentioned that the transition metal complex was diamagnetic when it was…
Laff70
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How to calculate denticity of ligands?

When looking at an ligand, how do I know its denticity? For instance, I know that though there are 2 lone pairs in $\ce{H2O}$, its denticity is only 1 due to geometrical reasons as the 2 of them can't be facing the metal ion at the same time.…
bean
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How can t2g orbital account for extra stability in absence of ligands?

I have read in a book that t2g orbitals sometimes account for stability in 3d block transition elements. For example, Chromium in 2+ oxidation state shows reducing properties because Chromium in 3+ oxidation state will have half-filled t2g orbitals…
Scientia_potentia_est
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Ionization enthalpies of Transition elements

“There is generally expected increasing trend in the values as the effective nuclear charge increases. However the value[First ionisation enthalpy] of Cr is lower because of the absence of regarding any change in d configuration and the value of Zn…
xrfxlp
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Oxidation state in transition metals

Why does scandium has +2 oxidation state unstable? It only has +3 oxidation state stable. Scandium has outermost electronic configuration as 3d¹4s². Why it does not lose two 4s e- only instead of all three?
user66257
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Transition metal order of filling electron

There is a specific order for filling electron for transition metals, but I don't know if it applies to other elements too? Some thing to take note of in this picture is the order of 3d and 4s. My belief is: 3d has a higher energy level than 4s, and…
most venerable sir
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How to make anhydrous or monohydrate FeSO4 from heptahydrate form?

I need the anhydrous form of $\ce{FeSO4}$ (7720-78-7). I have $\ce{FeSO4.7H2O}$, is there anyway it can be converted to anhydrous form, or at least to monohydrate? Do you know where I can purchase it? Most vendors only have the heptahydrate form,…
TRANG LE
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precipitation reaction - cellulose in schweizer reagent reacts with acid

In the regeneration of dissolved cellulose (in a cuprammonium solution) in an acid bath, say sulphuric acid, what is the chemical reaction? There is a lot about the chemistry of the production of the copper ammonia complex but nothing about the…
trialNerror
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Why are aqua ion complexes of transition elements not solid but a solution?

Water ligands form dative covalent bonds with the central transition metal ion. That would mean a molecule is formed, just like sulfur dioxide or any other. The transition metal ion does not form dipole ion attraction with water as does sodium…
Anurag Sharma
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Why n-Butane has high B. p than iso-Pentane although both have equal no. of carbon atoms along the chain length?

n-Butane =B. p =-1 oC iso pentane =b. p= 28 oC
daar
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