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Silicon

silicon

(Science: chemistry, element) A nonmetalic element analogous to carbon. It always occurs combined in nature, and is artificially obtained in the free state, usually as a dark brown amorphous powder, or as a dark crystalline substance with a meetallic luster. Its oxide is silica, or common quartz, and in this form, or as silicates, it is, next to oxygen, the most abundant element of the earth's crust. Silicon is characteristically the element of the mineral kingdom, as carbon is of the organic world.

Abbreviation: Si

Atomic weight: 28.

Synonym: silicium.

See: silica.


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Re: Life in the universe?

... one we know. There are scientists who think that even liquid methane oceans in some planets/moons could harbour some kind of life forms. Silicon-based life has also been proposed several times. Of course, it has been very challenging to propose a chemical model for that kind of life to ...

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by biohazard
Tue Mar 23, 2010 8:00 am
 
Forum: Evolution
Topic: Life in the universe?
Replies: 7
Views: 4009

Re:

The biggest problem with silicon would be its greater reactivity and hence lack of stability. One thing I found interesting while researching is that silicon dioxide (the equivalent of carbon dioxide) is solid at temperatures where CO2 ...

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by JackBean
Tue Nov 17, 2009 7:30 am
 
Forum: General Discussion
Topic: Possibilities for Alien Life
Replies: 9
Views: 6236

Possibilities for Alien Life

The biggest problem with silicon would be its greater reactivity and hence lack of stability. One thing I found interesting while researching is that silicon dioxide (the equivalent of carbon dioxide) is solid at temperatures where CO2 ...

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by alextemplet
Mon Nov 16, 2009 8:56 pm
 
Forum: General Discussion
Topic: Possibilities for Alien Life
Replies: 9
Views: 6236

Possibilities for Alien Life

... such a planet. I realize using lithium presents something of a problem, but the lack of oxygen that would be present in such an environment makes silicon a practical alternative to carbon. It also has four valence electrons and can form similarly endless chains of itself. Sulfur would be oxygen ...

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by alextemplet
Mon Nov 16, 2009 6:23 am
 
Forum: General Discussion
Topic: Possibilities for Alien Life
Replies: 9
Views: 6236

Possibilities for Alien Life

... a planet where all biochemistry is exactly like earth but moved one row down on the periodic table; for example, lithium would replace hydrogen, silicon would replace carbon, etc. This would produce broadly similar chemistry to earth-like systems, although the existence of d-orbitals in the 3rd ...

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by alextemplet
Mon Nov 16, 2009 2:51 am
 
Forum: General Discussion
Topic: Possibilities for Alien Life
Replies: 9
Views: 6236
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