Test your knowledge !!!

Casmira · 18 Feb 2005, 10:19 PM

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Quote:

Originally Posted by theChemCoach

Have a go at this one:

Q). What is the most important sub-atomic particle? Justify your answer.

Neutron, because of its no charge it balances out the charge in atoms, without that all atoms would be ions

theChemCoach · 18 Feb 2005, 10:25 PM

Its great to see people have a go at this one.

The answer is....(drum roll)

the ELECTRON

the neutron is indeed the least significant of all sub-atomic particles.

From the responses, its clear your study nuclear chemistry played heavily on your responses.

Why electron?
Slide_Rule presented some really important point.

The location and number of electrons in an atom determine the reactivity of that atom, hence its chemical bonding, they determine the shape & geometry of the compounds the element will form...

Slidey · 18 Feb 2005, 10:27 PM

Quote:

Originally Posted by Casmira

Neutron, because of its no charge it balances out the charge in atoms, without that all atoms would be ions

Tell me, are positronium, protonium and hydrogen-0 ions?

theChemCoach · 18 Feb 2005, 10:30 PM

positronium, protonium and hydrogen-0 ions?

please explain

Slidey · 18 Feb 2005, 10:36 PM

Quote:

Originally Posted by theChemCoach

positronium, protonium and hydrogen-0 ions?

please explain

Lack of neutrons does not make something an ion, as Casmira implied.

Positronium: A positron (anti-electron) orbiting an electron, or vice versa - resembles hydrogen in most aspects except spectral lines, which is because of the decreased weight. NO NEUTRON, but not an ion.
Protonium: A proton and an anti-proton. As far as I know it is NOT similar to hydrogen. NO NEUTRON, but not an ion.
Hydrogen-0: An isotope of hydrogen without a neutron, leaving a proton and an electron. I not sure what it's actual name is - I forget, so I called it hydrogen-0.

EDIT: Changed 'nucleus' to 'neutron'.

KFunk · 19 Feb 2005, 8:05 AM

I think you're describing a standard hydrogen atom. Deuterium (with one proton, one neutron and one electron) is an isotope of what is ussually an electron orbiting a proton. [Which is why you might sometimes hear your H⁺ ions in electro-chem refered to as protons]

EDIT: I was just giving it a thought and it's possible that the name you were thinking of was protium.

Slidey · 19 Feb 2005, 11:20 AM

Quote:

Originally Posted by KFunk

I think you're describing a standard hydrogen atom. Deuterium (with one proton, one neutron and one electron) is an isotope of what is ussually an electron orbiting a proton. [Which is why you might sometimes hear your H⁺ ions in electro-chem refered to as protons]

EDIT: I was just giving it a thought and it's possible that the name you were thinking of was protium.

It is not called protium - protium is exotic matter. I was not aware, though, that the most common isotope of hydrogen had no neutrons. A bit weird though... just because it is the most common isotope doesn't mean it should be called hydrogen, does it (I'm not arguing with you - you're correct)?

KFunk · 19 Feb 2005, 11:24 AM

Quote:

Originally Posted by Slide Rule

It is not called protium - protium is exotic matter. I was not aware, though, that the most common isotope of hydrogen had no neutrons. A bit weird though... just because it is the most common isotope doesn't mean it should be called hydrogen, does it (I'm not arguing with you - you're correct)?

I agree, it is a bit strange but when you consider than many elements don't have an equal number of protons and nuetrons then it ceases to be odd really. Btw, IUPAC call it protium... it's just not a very commonly used term.

http://www.iupac.org/goldbook/P04903.pdf

Slidey · 19 Feb 2005, 11:37 AM

Doh! I apologise - I was confusing protonium with protium.

KFunk · 19 Feb 2005, 11:40 AM

Haha, no problem. I have a similar habit of hearing manganese as magnesium.

theChemCoach · 2 Mar 2005, 7:37 PM

Dear All,

Here is a challange!

Who can post all the correct answers to the MC QUIZ given in the first post of the thread!

Best of Luck,
George

mouldy_bread · 6 Mar 2005, 9:11 PM

If it helps at all, I was going to pick electron... call it an educated guess but it was just because electrons do so much - their moving around creates ions... they make some batteries work ( I think ) with the whole salt bridge thing...

velox · 20 Mar 2005, 11:59 AM

question 1 was the first question in james ruses paper last yr.

Slidey · 20 Mar 2005, 1:28 PM

Quote:

Originally Posted by mouldy_bread

they make some batteries work ( I think ) with the whole salt bridge thing...

They make ALL batteries work. :P

3.1415926535897 · 20 Mar 2005, 4:16 PM

how are these looking

D
B
C
A
B
D
D
A
A
B
A
A

18 Feb 2005, 10:25 PM	#17 (permalink)
theChemCoach chem extraordinaire HSC: N/A Gender: Male Location: Sydney City Join Date: Oct 2004 Posts: 184 Last Activity: 18 Jul 2006, 4:26 PM	Its great to see people have a go at this one. The answer is....(drum roll) the ELECTRON the neutron is indeed the least significant of all sub-atomic particles. From the responses, its clear your study nuclear chemistry played heavily on your responses. Why electron? Slide_Rule presented some really important point. The location and number of electrons in an atom determine the reactivity of that atom, hence its chemical bonding, they determine the shape & geometry of the compounds the element will form... __________________ . HSC CHEMISTRY www.chemistrycoach.com.au Last edited by theChemCoach; 18 Feb 2005 at 10:29 PM.

18 Feb 2005, 10:30 PM	#19 (permalink)
theChemCoach chem extraordinaire HSC: N/A Gender: Male Location: Sydney City Join Date: Oct 2004 Posts: 184 Last Activity: 18 Jul 2006, 4:26 PM	positronium, protonium and hydrogen-0 ions? please explain __________________ . HSC CHEMISTRY www.chemistrycoach.com.au

19 Feb 2005, 8:05 AM	#21 (permalink)
KFunk Psychic refugee HSC: 2005 Gender: Male Location: Sydney Join Date: Sep 2004 Posts: 2,825 Last Activity: 16 Mar 2010, 2:24 PM Blog Entries: 1	I think you're describing a standard hydrogen atom. Deuterium (with one proton, one neutron and one electron) is an isotope of what is ussually an electron orbiting a proton. [Which is why you might sometimes hear your H⁺ ions in electro-chem refered to as protons] EDIT: I was just giving it a thought and it's possible that the name you were thinking of was protium. __________________ Philosophy(hons)/Medicine @ UNSW - entering 5^th year - "The Nothing itself nothings." (ex pumice aquam) Last edited by KFunk; 19 Feb 2005 at 8:19 AM.

19 Feb 2005, 11:40 AM	#25 (permalink)
KFunk Psychic refugee HSC: 2005 Gender: Male Location: Sydney Join Date: Sep 2004 Posts: 2,825 Last Activity: 16 Mar 2010, 2:24 PM Blog Entries: 1	Haha, no problem. I have a similar habit of hearing manganese as magnesium. __________________ Philosophy(hons)/Medicine @ UNSW - entering 5^th year - "The Nothing itself nothings." (ex pumice aquam)

2 Mar 2005, 7:37 PM	#26 (permalink)
theChemCoach chem extraordinaire HSC: N/A Gender: Male Location: Sydney City Join Date: Oct 2004 Posts: 184 Last Activity: 18 Jul 2006, 4:26 PM	Dear All, Here is a challange! Who can post all the correct answers to the MC QUIZ given in the first post of the thread! Best of Luck, George __________________ . HSC CHEMISTRY www.chemistrycoach.com.au

6 Mar 2005, 9:11 PM	#27 (permalink)
mouldy_bread Assistant Member HSC: 2005 Gender: Female Join Date: Mar 2005 Posts: 61 Last Activity: 19 Oct 2005, 6:32 PM	If it helps at all, I was going to pick electron... call it an educated guess but it was just because electrons do so much - their moving around creates ions... they make some batteries work ( I think ) with the whole salt bridge thing... __________________ Courses: Advanced English Chemistry English Extension Modern History Mathematics Music

20 Mar 2005, 11:59 AM	#28 (permalink)
velox Retired HSC: N/A Gender: Male Location: Where the citi never sleeps. Join Date: Mar 2004 Posts: 5,547 Last Activity: Today, 3:01 PM	question 1 was the first question in james ruses paper last yr.

20 Mar 2005, 4:16 PM	#30 (permalink)
3.1415926535897 Pi Pi Pi Pi Pi Pi Pi Pi!! HSC: 2005 Gender: Male Join Date: Mar 2005 Posts: 32 Last Activity: 27 Mar 2006, 5:27 PM	Hopeful how are these looking D B C A B D D A A B A A

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