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Author Topic: Why is it difficult to purify an inner-transitional metal?  (Read 2858 times)

Offline The Scientist

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Please provide detailed answers. Thanks!


 

Offline The Scientist

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Why is it difficult to purify an inner-transitional metal?
« Reply #1 on: 09/07/2010 15:48:59 »
Can anyone firstly explain about what is an inner-transitional metal? Thanks!
 

Offline Bill.D.Katt.

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Why is it difficult to purify an inner-transitional metal?
« Reply #2 on: 10/07/2010 20:13:55 »
Usually "inner transition metals" refers to lanthanides and actinides, these are the two removed periods that are usually placed below the table.
 

Offline The Scientist

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Why is it difficult to purify an inner-transitional metal?
« Reply #3 on: 11/07/2010 09:58:57 »
Usually "inner transition metals" refers to lanthanides and actinides, these are the two removed periods that are usually placed below the table.

But why do you think that those two periods are called inner transitional?
 

Offline tommya300

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Why is it difficult to purify an inner-transitional metal?
« Reply #4 on: 11/07/2010 15:29:08 »
Usually "inner transition metals" refers to lanthanides and actinides, these are the two removed periods that are usually placed below the table.

But why do you think that those two periods are called inner transitional?

"The f-block of the periodic table of the elements consists of those elements whose atoms or ions have valence electrons in f-orbitals. Actual electronic configurations may be slightly different from what is predicted by the aufbau principle. The elements are also known as inner transition elements. There are two series. Elements of the series in which the electrons are in 4f orbitals belong to the lanthanoid series. Elements of the series in which the electrons are in 5f orbitals belong to the actinoid series. There is a long-standing controversy as to whether La and Ac or Lu and Lr should belong to the f-block. IUPAC has now compromised by putting all 4 elements into the block, but this is contested, because there can only be 14 elements in f orbitals, so the block cannot be 15 elements wide."
 

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Why is it difficult to purify an inner-transitional metal?
« Reply #4 on: 11/07/2010 15:29:08 »

 

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