Hafnium: Difference between revisions

From Citizendium
Jump to navigation Jump to search
imported>David Yamakuchi
m (New page: {{subpages}}{{Basic elemental info}}<references/>)
 
imported>Milton Beychok
m (Replaced infobox,added content to infobox, edited the lede.)
 
Line 1: Line 1:
{{subpages}}{{Basic elemental info}}<references/>
{{subpages}}
 
{{Elem_Infobox
|elName=Hafnium
|eltrnCfg=1s<sup>2</sup>2s<sup>2</sup>2p<sup>6</sup>3s<sup>2</sup>3p<sup>6</sup>3d<sup>10</sup>4s<sup>2</sup>4p<sup>6</sup> 4d<sup>10</sup>5s<sup>2</sup>5p<sup>6</sup>4f<sup>14</sup>5d<sup>2</sup>6s<sup>2</sup>
|no1=
|no2=
|no3=
|no4=
|properties=Shiny, steel gray, ductile metal.
|compounds=
|uses=
|hazard=Pyrophoric and will ignite spontaneously in the air.
}}
 
'''Hafnium''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] Hf. Its [[atomic number]] (the number of [[proton]]s) is 72. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 178.49 g•mol<sup> −1</sup> and is a [[solid]] in its elemental form.
 
Hafnium  is considered a member of the "Transition metal" class of elements. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] of 4,603°[[Celsius (unit)|C]] and a [[melting point]] of 2,233 °C.

Latest revision as of 15:24, 30 April 2011

This article is a stub and thus not approved.
Main Article
Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
Properties [?]
 
This editable Main Article is under development and subject to a disclaimer.
Hafnium
178.49(2)



  Hf
72
1s22s22p63s23p63d104s24p6 4d105s25p64f145d26s2
[ ? ] Transition metal:
Properties:
Shiny, steel gray, ductile metal.
Hazard:
Pyrophoric and will ignite spontaneously in the air.


Hafnium is a chemical element, having the chemical symbol Hf. Its atomic number (the number of protons) is 72. It has a standard atomic weight of 178.49 g•mol −1 and is a solid in its elemental form.

Hafnium is considered a member of the "Transition metal" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 4,603°C and a melting point of 2,233 °C.