Question
Mon February 18, 2013 By: Sahil
 

MAM I WANT TO KNOW THE ELECTRONIC CONFIGURATION OF FOLLOwing element ZINC ASTATINE RADIUM TITANIUM AND WHAT ARE LANTHANOIDES AND ACTINOIDES ?

Expert Reply
Tue February 19, 2013

Zinc (Zn) = 30 [Ar] 3d10 4s2

1s2

2s2

2p6

3s2

3p6

3d10

4s2

Astatine (At) = 85 [Xe] 4f14 5d10 6s2 6p5

1s2

2s2

2p6

3s2

3p6

3d10

4s2

4p6

4d10

4f14

5s2

5p6

5d10



6s2

6p5

Radium (Ra) = 88 [Rn] 7s2

1s2

2s2

2p6

3s2

3p6

3d10

4s2

4p6

4d10

4f14

5s2

5p6

5d10


6s2

6p6



7s2

Titanium (Ti) = 22 [Ar] 3d2 4s2   

1s2

2s2

2p6

3s2

3p6

3d2

4s2

 

The f-block consists of two series of fourteen elements each placed at the bottom of the periodic table. The two series of the f-block elements are the lanthanides and the actinides.  Lanthanides are the series of elements where the differentiating electron enters the 4f sub-shell. In the Actinides the differentiating electron enters the 5f sub-shell. The lanthanides and actinides are together also known as rare earths.

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