Bell Ringer Log onto SOCRATIVE (room # = crice) OR Get a paper copy! (Turn into the black bin on the front table) READ over your Lab Procedure!!!

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Presentation transcript:

Bell Ringer Log onto SOCRATIVE (room # = crice) OR Get a paper copy! (Turn into the black bin on the front table) READ over your Lab Procedure!!!

Flame Test & Electron Energy I can explain the production of visible light as a result of an electron’s excited state

Energy Level Diagram 2 e - ’s 8 e - ’s 18 e - ’s 32 e - ’s

Ground state: All electrons in an atom have the lowest possible energies All electrons in an atom have the lowest possible energies Most stable Most stable Excited State: Electron(s) have absorbed energy & are in now in an higher energy orbital Electron(s) have absorbed energy & are in now in an higher energy orbital Very unstable Very unstable Electron Configuration

Lithium Add Energy in the form of HEAT

Lithium

Excited State

Lithium Electron returns to ground state Energy is given off as LIGHT

Emission Spectrum Each element has a unique electron movement pattern Each element has a unique electron movement pattern Emission spectrum Emission spectrum As they move between energy levels, electrons absorb or emit specific amounts of energy As they move between energy levels, electrons absorb or emit specific amounts of energy Amount of energy corresponds to specific wavelengths (colors) of light. Amount of energy corresponds to specific wavelengths (colors) of light.

Red. Orange. Yellow. Green. Blue. Indigo. Violet Long wavelength Short wavelength Less Energy Greater Energy Red Orange Yellow Green Blue Indigo Violet

Practical Uses Fireworks Fireworks Forensics Forensics Lasers Lasers

Safety Read & Follow ALL Lab Procedures! Read & Follow ALL Lab Procedures! Find Element Symbols Find Element Symbols Leave burners on until everyone’s finished Leave burners on until everyone’s finished GOGGLES! GOGGLES! Long hair tied back! Long hair tied back! Stay focused & be aware of flame! Stay focused & be aware of flame! DO NOT touch the nichrome wire! DO NOT touch the nichrome wire!