Checklist: _ Trend is stated _ Shielding ___ Nuclear charge

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Presentation transcript:

Checklist: ___ Trend is stated ___ Shielding ___ Nuclear charge ___ Highest filled orbital ___ Coulomb’s Law (optional)

Evidence of Atomic Theory: We have seen several pieces of evidence supporting ideas about electron arrangement. 1. Light being emitted by excited atoms

Evidence of Atomic Theory: We have seen several pieces of evidence supporting ideas about electron arrangement. 1. Light being emitted by excited atoms 2. PES – Photoelectron Spectroscopy

Evidence of Atomic Theory: We have seen several pieces of evidence supporting ideas about electron arrangement. 1. Light being emitted by excited atoms 2. PES – Photoelectron Spectroscopy IS THERE ANY EVIDENCE SUPPORTING WHAT WE THINK NUCLEI LOOK LIKE?

Mass Spectrometry: The theory- Shot put The theory- With the hair dryer off – balls roll straight down With the hair dryer on – they are deflected according to …

Mass Spec: The instrument- 1. A small sample is ionized, usually to cations by loss of an electron. The Ion Source 2. The ions are sorted and separated according to their mass and charge. The Mass Analyzer 3. The separated ions are then measured, and the results displayed on a chart. The Detector Ions with greatest mass and smallest charge are deflected the least!

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The two common isotopes of Chlorine have masses of 35 and 37 The two common isotopes of Chlorine have masses of 35 and 37. Explain the existence of these three peaks in the mass spectra of Chlorine.

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