Bohr Diagrams - Wappingers Central School District

Bohr Diagrams - Wappingers Central School District

Bohr Diagrams Electron Energy States Bohr Model Bohr - electrons in an atom can have only specific amounts of energy NEW idea! quantum number (n) assigned to each orbit the smallest orbit (n= 1) is closest to the nucleus

has the lowest energy the larger the orbit, the more energy it has n = 7 has highest energy Bohr Diagram Shows all the electrons in orbits or shells about the nucleus. n=3 n=2 n=1

E3 n=1 E2 n=2 E1 n=3 Electron Transitions Energy is absorbed: electron gains energy, becomes excited and moves to higher orbit (farther from nucleus) Endothermic process

Energy is released: electron loses energy and drops to lower orbit (closer to nucleus) Exothermic process LIGHT is emitted energy levels get closer together as move away from nucleus

Larger orbits hold more electrons Max Capacity of Bohr Orbits Orbit Max # of Electrons 1

2 2 8 3 18

4 32 n 2n2 Ground State vs. Excited State Ground state:

lowest energy state of atom electrons are in lowest possible energy levels Configurations in Reference Tables are ground state Excited state: many possible excited states for each atom one or more electrons excited to higher energy level 2-8-5 ground state excited state possibilities:

2-8-4-1 2-8-3-2 2-8-3-1-1 etc

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