Difference between revisions of "Actinium"
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(largest mass element to naturally exist) |
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{{Element | name=Actinium | symbol=Ac | anumber=89 | amass=227.0 amu | noe=89 | class=Transition Metal | cstructure=Cubic | color=Silver | date=1899 | discname=André-Louis Debierne | origname=From the Greek ''aktinos''. | uses=Unknown | obtained=Unknown, as it is extremely rare. }} | {{Element | name=Actinium | symbol=Ac | anumber=89 | amass=227.0 amu | noe=89 | class=Transition Metal | cstructure=Cubic | color=Silver | date=1899 | discname=André-Louis Debierne | origname=From the Greek ''aktinos''. | uses=Unknown | obtained=Unknown, as it is extremely rare. }} | ||
| − | '''Actinium''' is a very rare [[radioactive]] chemical [[element]]. It is silvery-white and glows blue in the dark.<ref>[[Encylopaedia Britannica]] online, [http://www.britannica.com/eb/article-9003601/actinium ''Actinium'']</ref> | + | '''Actinium''' is a very rare [[radioactive]] chemical [[element]]. It is silvery-white and glows blue in the dark.<ref>[[Encylopaedia Britannica]] online, [http://www.britannica.com/eb/article-9003601/actinium ''Actinium'']</ref> This is the largest element know to naturally exist. As far as modern science knows, all larger elements must be created synthetically. |
==References== | ==References== | ||
<references /> | <references /> | ||
{{Periodic table}} | {{Periodic table}} | ||
Revision as of 21:39, September 15, 2016
| Actinium | |
|---|---|
| Properties | |
| Atomic symbol | Ac |
| Atomic number | 89 |
| Classification | Transition Metal |
| Atomic mass | 227.0 amu |
| Other Information | |
| Date of discovery | 1899 |
| Name of discoverer | André-Louis Debierne |
| Name origin | From the Greek aktinos. |
| Uses | Unknown |
| Obtained from | Unknown, as it is extremely rare. |
Actinium is a very rare radioactive chemical element. It is silvery-white and glows blue in the dark.[1] This is the largest element know to naturally exist. As far as modern science knows, all larger elements must be created synthetically.
References
- ↑ Encylopaedia Britannica online, Actinium
| Periodic Table of the Elements | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
89**
Ac 227.03 |
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| *Lanthanides | ||||||||||||||||||||||||
| **Actinides | ||||||||||||||||||||||||
