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If you see me talking to myself tomorrow. Its because im practicing my French oral.
Or
I havent taken my anti-demon pills: Exorcist (R) brand.
whichever.
I will be so glad when this week is over. Does anyone know why sulfur has a higher melting point than phosphorus argon and chlorine? I sure as hell dont. effing chemistry.
im out.
If you see me talking to myself tomorrow. Its because im practicing my French oral.
Or
I havent taken my anti-demon pills: Exorcist (R) brand.
whichever.
I will be so glad when this week is over. Does anyone know why sulfur has a higher melting point than phosphorus argon and chlorine? I sure as hell dont. effing chemistry.
im out.
posted by returntocenter at 7:40 PM
5 Comments:
update
hmm, why sulfur has a higher melting point than phosphorus argon and chlorine? Easy...
sulfur has a higher melting point than phosphorous cos:
--its molecule is larger
--has higher M_r
--S_8
--it has more electrons
--it has stronger van der waals' (london) forces
hehe, those boiling melting point questions were easy, but i think i failed the extended essay...
--eliot
PS: hey check out my new bog, will update soon! :P
supposed to be: --@ eliot not --eliot
typo...
Sulfur phosphorus chlorine and argon arent molecules or compounds, so there cant be any intermolecular forces. Phosphorus is bigger than sulfur and both chlorine and argon have more electrons.
There arent any trends these atoms correspond to.
So i have no idea what the right answer is.
wait, which question are you referring to? supposedly S is not a molecule, but when combined with other atoms it is a molecule. and van der waals just shows attraction and its relation to mass intermolecularly
(anyway let me type this up from memory)
The elements of period 3 and their compouds show period trends. By referring to the type of bonding and structure, when appropriate, explain the following:
i) the melting pint of magnesium is greater than that of sodium
ii) silicon has highest melting point
iii) phosphorous, chlroine, and argon have lower melting points than the other elements
iv) sulfur has a higher melting point than phosphorous
answers:
i) attraction of ions and e- increases (obviously)
magnesium ions more positive than sodium ions (this is shown in the periodic table) and release twice as many e-
magnesium ion smaller than sodium ion
ii) covalent bonds throughout the structure so you need a lot of NRG to break
iii) exist as small, separate, and discrete molecules; weaker van der waals forces, intermolecular forces between the them
iv) this one has been already answered
but don't worry...if you write out a lot, explain the trend, then you should get some half a point at least :P
it was the hardest chem test ever btw...
ugh, haven't done my chem lab yet, but will do during classes (hopefully)
see ya in hist & chem
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