Topic 2/12 Overview 2.1: The Nuclear Atom 2.2: Electron configuration

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Presentation transcript:

Topic 2/12 Overview 2.1: The Nuclear Atom 2.2: Electron configuration 12.1: Electrons in Atoms

A simple diagram

A more accurate depiction Femtometer: 1 fm = 10−15 m

Subatomic Particles (+) 1.6*10-19 C (-) 1.6*10-19 C Proton Neutron Electron Charge (+) 1.6*10-19 C (-) 1.6*10-19 C Mass 1.67*10-27 kg 1.68*10-27 kg 9.1*10-31 kg Relative mass 1 1/1836 = 5.5*10-4 Place in atom Nucleus Energy Levels

Atom Information

Atoms vs Ions

How do we determine relative abundance?

Average = (0.79)(24 amu) + (0.10)(25 amu) + (0.11)(26amu) = 24.31 amu Average Atomic Mass Average = (0.79)(24 amu) + (0.10)(25 amu) + (0.11)(26amu) = 24.31 amu

(Average) Atomic Mass

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Mass Spec Visuals

A Naturally Occurring Sample of Mg Isotopes(def.)- Relative abundance (def.)-

Calculate the atomic mass of magnesium based on the mass spectrum below.