The Bohr Model: Atoms with Orbits pg. 291-294 LO: I can explain what line spectra represent.

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Presentation transcript:

The Bohr Model: Atoms with Orbits pg LO: I can explain what line spectra represent.

Neon Signs What gives neon signs their color? Each tube is filled with gas of a specific atom. Electricity excites the gas by exciting electrons which then emit a unique color (wavelength).

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Spectra Line Spectra: Light bands of specific wavelengths with areas of black space (non- continuous) which can be seen looking through a prism at gas filled fluorescent lamps or metal atoms in flame.

Spectra  electrons exist only on specific pathways Hydrogen

Why do elements have emission spectra? Orbitals: Electrons only travel at specific orbits (energy levels) around the nucleus. The orbits are quantized. The energy of each orbit is specified by a quantum number. The higher the number, the more energy the electron has.

Why do elements have “specific” emission spectra? Hydrogen Light emitted = quantum of light energy

Why do elements have emission spectra? Poster Drawings How are they connected in your drawing? Energy of electron Wavelength Spectra color Pg

As n (electron orbitals) increases energy of the electron increases As n (electron orbitals) increases move closer together The energy of light (wavelength) corresponds to the difference in the energy transition Pg. 294