Quiz 11-7-12 Identify the symbols 1.ν 2.λ 3.Ca 4.K 5.Na 6.B 7.Ba 8.Mg 9.E 10.c.

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Presentation transcript:

Quiz Identify the symbols 1.ν 2.λ 3.Ca 4.K 5.Na 6.B 7.Ba 8.Mg 9.E 10.c

Memorize the following

Quantum Mechanics and the Bohr Model

Electrons are arranged in energy levels T he normal energy state is called the ground state The excited energy level is called the excited state. Electrons gain energy When electrons relax back down to the ground state, electromagnetic radiation is given off. Light = electromagnetic radiation Energy is released in the form of light

Electrons are arranged in energy levels. Electrons gain energy When electrons relax back down to the ground state electromagnetic radiation is given off. The more energy levels the electron travels, the more energetic the “light”. Energy in the form of light more energy given off as light less energy given off as light

Higher energy = higher frequency Lower energy = lower frequency

How do you calculate the energy given off by electrons when they relax back down to the “ground state”?

Step 1 – underline important information. Step 2 – identify the knowns and unknowns. Step 3 – identify the correct equation. Step 4 – rearrange the equation to solve for the unknown. Step 5 – solve for the unknown.

Step 1 – underline important information.

Step 2 – identify the knowns and unknowns.

Step 1 – underline important information. Step 2 – identify the knowns and unknowns. Step 3 – identify the correct equation. E = h ν or c = λ ν

c = λ ν Step 4 – rearrange the equation to solve for the unknown.

c = λ ν Step 5 – solve for the unknown.

Step 1 – underline important information.

Step 2 – identify the knowns and unknowns.

Step 3 – identify the correct equation. E = h ν or c = λ ν

Step 4 – rearrange the equation to solve for the unknown.

HW By Wednesday Finish all of the “light math” worksheets. 11/8 Page 17 due 11/9 page 19 due 11/14 page 20 due Thursday Lab page 21 extra credit sheets pp 23, 27 mv = momentum – v in momentum is VELOCITY not ν (frequency).