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Learning Intentions

• You can identify different forms of light that are used to understand electronic structure in an atom.

• You can describe how frequency, wavelength and the speed of light are related and how to use the equation c=ʎv to solve for them.

• You can identify what energy and Plank's constant are and use the equation E=hv to solve for energy and frequency.

• You can explain the light emitted from excited electrons is used to explore electronic structure of an atom.

• You can multiply and divide using scientific notation.

• You can put a scientific notation number into your calculator to make accurate calculations.

Content Standards being covered:

Student can identify metric units for common measurements used in Chemistry and accurately makes conversions using metric system.
23. In scientific notation, large numbers have a power of 10 with a positive superscript and smaller numbers (decimals) have a power of 10 with negative superscripts

Student understand the quantum mechanical atomic model that describes the structure of an atom and changes that can occur to that structure.
62. Max Planck developed the idea of “quanta” - a discrete unit of Energy related to frequency
68. Elements, when excited with enough energy, will emit their own atomic emission spectrum, a unique set of frequencies on the electromagnetic spectrum due to the transition of electrons from a higher to a lower energy state
69. The electromagnetic spectrum is the broad range of frequencies emitted through electromagnetic radiation
70. Electromagnetic radiation moves through space in waves
71. One complete wavelength is measured from crest to crest or trough to trough, is symbolized by the Greek symbol lambda λ, and is measured in meters (m)
72. The frequency of a wave is how many complete wave occur per second, is symbolized by ѵ, and is measured in Hertz (Hz= 1/seconds= seconds-1)
73. The speed of light, c, is equal to 3.0 X 10⁸ m/s
74. As wavelength (λ) increases, the frequency (ѵ) of the wave decreases and therefore relate to one another using the equation c= λѵ
75. The frequency of the visible light spectrum increases from ROYGBI to V (red, orange, yellow, green, blue, indigo, and violet)
76. The photoelectric effect is when metals emit electrons (called photoelectrons) when light shines on them
77. The frequency of the electron can be related to the Energy of it using the equation E=hѵ (where h= Planck’s Constant= 6.626 x 10^¯34 J s)

Habits of Mind/Life skills being covered:

Responding with Wonderment and Awe

Journal Entry:

    What do the letters in the equation c=ʎv stand for and what unit would you use for each?