Author Topic: Chemistry Help!  (Read 7734 times)

Offline Naruto

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Re: Chemistry Help!
« Reply #15 on: April 26, 2009, 05:42:01 pm »
@twilight and hyebyekadal
The question is this that whether the compoud caesium chloride will be radioactive or not? If i haven't understood wrong then u guyz said tht the caesium will still remain radioactive and so you mean that the compoud will also be radioactive ???

Well, I thought the answer was No because... Radioactivity is a nuclear process and not a chemical reaction... while bonding with chlorine is a chemical reaction and so the compound caesium chloride will not be radioactive.

But i not sure im right or wrong ???

Offline hyebyekadal

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Re: Chemistry Help!
« Reply #16 on: April 26, 2009, 05:52:29 pm »
ur rong itll remain radoactive.. read ur notes . or read my comment again. i have to go now.

Offline sweetsh

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Re: Chemistry Help!
« Reply #17 on: April 26, 2009, 06:12:17 pm »
This is not included in IGCSE 2009 syllabus

Offline astarmathsandphysics

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Re: Chemistry Help!
« Reply #18 on: April 26, 2009, 08:44:04 pm »
Chemical and radioactive process are completely independent and radioactive elements remain radioactive even when they are part of a compound

Offline twilight

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Re: Chemistry Help!
« Reply #19 on: April 26, 2009, 08:50:04 pm »
yup .. and that's why they told u the meat was radio active .. caesium would surly b in the form of a compound in the meat
if it radioactivity would b affected by chemical reactions then the meat would not become radioactive as caesium would have gone through a series of chemical reactions in the goat's body

so it's a clue that's given that means radioactive caesium would still remain radioactive even in a compound
Words and hearts should be handled with care
For words mis-spoken and hearts when broken are the hardest things to repair

Offline sweetsh

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Re: Chemistry Help!
« Reply #20 on: April 26, 2009, 08:52:23 pm »
twilight it is not included =\ Right right?

Offline Naruto

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Re: Chemistry Help!
« Reply #21 on: April 26, 2009, 09:18:07 pm »
OKay i got it!! ;D Thanks a lot everyone for helping me out... You all are great :)

Offline twilight

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Re: Chemistry Help!
« Reply #22 on: April 26, 2009, 09:20:55 pm »
wut is not included sweetsh? the goat meat part ?
if u mean that then this part is in the question that naruto posted
but i meant reindeer not goat sorry ;) "In Sweden, caesium-137 built up in small plants called lichen. These plants were eaten by reindeers and gave rise to radioactive meat."
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Offline sweetsh

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Re: Chemistry Help!
« Reply #23 on: April 26, 2009, 09:27:04 pm »
Sorry guys it seems I misunderstood everything. I apologize im a bit tired and not okay.
Sorry again

Offline twilight

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Re: Chemistry Help!
« Reply #24 on: April 26, 2009, 09:29:21 pm »
its ok sweetsh  ;) ..   i hope u get ok soon .. jst take a rest
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Offline sweetsh

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Re: Chemistry Help!
« Reply #25 on: April 26, 2009, 09:33:10 pm »
Thank you. Yes I should

Offline Naruto

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Re: Chemistry Help!
« Reply #26 on: April 26, 2009, 09:38:18 pm »
Q: Uranium-238 is a radio-isotope found in the Earth. It has a proton (atomic) number of 92 and a mass number of 238.

(i) Uranium-238 atoms split up to give a different element. Why do uranium-238 atoms split up?           [2]

Okay i think that the answer is: Because it has unstable nuclie... so is this answer correct for a 2 marks question??

Offline astarmathsandphysics

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Re: Chemistry Help!
« Reply #27 on: April 26, 2009, 09:40:16 pm »
For a 2 mark question you might say also the products have less energy than the Uranium atom had to start with.

Offline twilight

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Re: Chemistry Help!
« Reply #28 on: April 26, 2009, 09:43:56 pm »
yeah .. and in order to reach to a more stable state
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Offline Naruto

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Re: Chemistry Help!
« Reply #29 on: April 26, 2009, 09:47:01 pm »
@ astar
Sorry, but i dint understood your answer :-[ ??? If u dont mind can u plzz explain it.