'81 br' presentation slideshows

Mass spec and molecular Weights

Unit 1-8 Chapter 3.3. Mass spec and molecular Weights. The mass of one 12 C atom = 12 amu or Da Most elements occur in nature as mixtures of isotopes (same proton#, different neutron#) Average atomic mass or atomic weight= ?( masses of its various isotopes x relative abundances).

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Ernest Rutherford (1871-1937)

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Proton

Proton A nuclear particle having a positive charge equal to that of the electron and a mass more than 1800 times that of the electron The number of protons in an atom is called the atomic number, Z.

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Lecture 23

Lecture 23. Quiz 6 Average = 72% (36 out of 50) Mass Spectrometry This week in lab: Ch 9 Final Report Due Synthetic #2 PreLab Due Next week in lab: Synthetic #1 Final Report Due. Molecular Ions.

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CH3Br, Mass analysis for Br containing mass peaks

CH3Br, Mass analysis for Br containing mass peaks agust, heima, ...CH3Br/PD for Br_CH3BR on 16505-100809vhwak.pxp Agust,www,....ch3br/PPT-100809ak.ppt. pnt. Assumption I:. H 3 C 81 Br +. 79 Br +. 81 Br +. H 2 C 81 Br +. H 3 C 79 Br + / HC 81 Br +. C 79 Br +. H 2 C 79 Br + /

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Things to address in our CH 3 Br studies / publication(s)

Things to address in our CH 3 Br studies / publication(s). Main reference is T. Ridley et al., JPC A, 112 , 7170, ( 2008 ): http://www3.hi.is/~agust/rannsoknir/papers/jpcA112-7170-08.pdf Emphasize both CH 3 79 Br and CH 3 81 Br and make relevant comparison.

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