A level physics help

decmatt

decmatt

decmatt

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Joined
10 May 2004
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East Yorkshire, UK
Hi

Have a test tomorrow and started an exam paper
http://www.aqa.org.uk/qual/gceasa/phya_assess.html

Jan 2003 - Unit 1

At the start im stuck, on Q1 b)i) it says calculate its charge in C for the iron formed, I thought it would be 4x 1.6x10-19 because there are 4 atoms now in the atom, however in the answer booklet it says its 2 x 1.6x10-19

Why is it 2 x 1.6x10-19?

I no I should go ask my teacher but I have my Unit 1 test tomorrow so that isnt really an option

Thanks a lot
 
it looses 2 electrons so it has as charge of 2 so times 2 by the charge of a electron to get the charge :D

edit i also have my module 1 test tommro :eek:
 
Because electron have a negative charge while protons have a positive charge so if 2 electrons are missing there are 2 more protons than electrons so it 2 x charge.
 
Thanks I have one more question I cant find the answer on

What particles are effected by strangeness that I need to know about?
 
Christ, I'm buggered if I know. Not a neutron or a proton, but anything else I wouldn't have the faintest. I studied the quark model and quantum chromodynamics as part of my masters degree last year and I didn't need to know that!

A quick bit of revision tells me that the K-Mesons, or Kaons (K0, K+, K- and Kbar0) all have one strange or antistrange quark as well as another quark, and the Sigma, Theta and Omega particles are all composed of three quarks, some of which can be strange. I would only think that you'd need to know about Kaons, though.
 
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