OCR Atomic Structure, Electronic Structure & Mass Spectroscopy

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Flashcards

The relative masses of a:
Proton
Neutron
Electron

1
1
≅0

The relative charges of a:
Proton
Electron
Neutron

+1
0
-1

The definition of an isotope

Atoms that have the same number of protons but a different number of neutrons

In Mass Spectroscopy, what does 'm/z' stand for?

Mass to charge ratio

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What does peak height represent?

The relative abundance of the ion

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Equation to calculate the relative atomic mass of an element

Sum (isotopic mass x % abundance) / 100

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A mass spectrum tells us two things about each isotope…..

m/z ratio
% abundance

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In mass spectrometry, Cl2 causes three molecular peaks in this ratio

9 : 6 : 1

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The shape of an s orbital

Spherical

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The shape of a p orbital

Figure of 8

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The number of electrons each orbital can hold

2 (a pair)

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Hund’s Rule

Electrons fill orbitals individually, then pair up

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The complete order in which electrons occupy orbitals (ie, the electronic structure of Krypton - 36 electrons)

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

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