Slide 1 / 70 Slide 2 / 70 1 According to Einstein’s view of matter and 2 What is Chemistry? energy, what is the common link between light and matter? Slide 3 / 70 Slide 4 / 70 3 How does diffraction effect the double slit 4 The wavelength of light emitted from a traffic light experiment? having a frequency of 6.15x10 14 Hz is _________. Slide 5 / 70 Slide 6 / 70 5 An electromagnetic wave has a frequency of 6x 10 5 6 An electromagnetic wave has a wavelength of 5x Hz. What is the wavelength? 10 -13 m. What is the frequency?
Slide 7 / 70 Slide 8 / 70 7 An electromagnetic wave has a frequency of 9x10 - 8 What is the frequency of yellow sodium light that 7 Hz. What is the wavelength? has a wavelength of 579nm? Slide 9 / 70 Slide 10 / 70 9 Electromagnetic radiation with a wavelength of 10 Explain Newton’s original ideas about the nature ________ nm appears as green light to the human of light. eye. The frequency of this light is 5.71x10 14 Hz. Slide 11 / 70 Slide 12 / 70 11 While standing in a room with two speakers 12 While standing in a room with two speakers (speakers A and B), each emitting sound with a (speakers A and B) centered about the center of wavelength of 2m, you notice you cannot hear the the room, pointed at the wall. You notice you sound. Compared to the closer speaker, what’s cannot hear the sound while standing 1 meter the smallest difference in distance to the further from the center of the far wall. What’s the next speaker (ignore reflection of sound off of walls distance from the center you could stand at that etc). would you to hear the sound at its loudest?
Slide 13 / 70 Slide 14 / 70 13 How are matter and energy related? 14 Why is the understanding of energy and matter vital to one’s understanding of Chemistry? Slide 15 / 70 Slide 16 / 70 15 How does interference effect the double slit 16 A radio station broadcasts at 101.5 MHz. The experiment? wavelength of the signal is __________ m. Slide 17 / 70 Slide 18 / 70 17 An electromagnetic wave has a wavelength of 1.5 18 An electromagnetic wave has a wavelength of 5x nm. What is the frequency? 10 -13 m. What is the frequency?
Slide 19 / 70 Slide 20 / 70 19 An electromagnetic wave has a wavelength of 300 20 What is the frequency of orange lithium light that m. What is the frequency? has a wavelength of 650nm? Slide 21 / 70 Slide 22 / 70 21 An FM radio station broadcasts electromagnetic 22 What is the frequency, in Hz, of electromagnetic radiation at a frequency of 99.5 MHz. The radiation that has a wavelength of 0.55 m? wavelength of this radiation is __________ m. Slide 23 / 70 Slide 24 / 70 23 What is the frequency of light, in Hz, that has a 24 What is the wavelength of light (nm) that has a wavelength of 1.23x10 -6 cm? frequency of 3.22x10 14 Hz?
Slide 25 / 70 Slide 26 / 70 25 What is the wavelength of light (nm) that has a 26 Explains Hyugen’s original ideas about the nature frequency 4.25x10 14 Hz? of light. Slide 27 / 70 Slide 28 / 70 27 How are the properties of fluids in a tank, sound 28 While standing in a room with two speakers from a set of speakers, and light passing through (speakers A and B) centered about the center of a double slit all related to one another? the room, pointed at the wall. You notice you cannot hear the sound while standing 1 meter from the center of the far wall. What’s the next distance from the center you could stand at that would still prevent you from hearing the sound. Slide 29 / 70 Slide 30 / 70 29 What is the energy of a photon that has a 30 What is the energy of a photon that has a frequency of 7.0 x 10 15 Hz? frequency of 4.5 x 10 15 Hz?
Slide 31 / 70 Slide 32 / 70 31 What is the energy of a photon that has a 32 Electromagnetic radiation with a wavelength of wavelength of 720 nm? 531 nm appears as green light to the human eye. The energy of one photon of this light is 3.74 x10 - 19 J. Thus, a laser that emits 2.3 x10 -2 J of energy in a pulse of light at this wavelength produces __________ photons in each pulse. Slide 33 / 70 Slide 34 / 70 34 What is the frequency (Hz) of a photon that has 33 The wavelength of a photon that has energy of 5.65 x 10 -19 J is __________ nm. energy of 4.38 x 10 -18 J? Slide 35 / 70 Slide 36 / 70 35 The energy of a photon that has a frequency of 36 What is the energy of a photon that has a 7.75 x 10 14 Hz is __________ J. wavelength of 450 nm?
Slide 37 / 70 Slide 38 / 70 37 Electromagnetic radiation with a wavelength of 38 The energy of a photon that has a wavelength of 525 nm appears as green light to the human eye. 10.0 m is __________ J The energy of one photon of this light is __________ J. Slide 39 / 70 Slide 40 / 70 39 What implication does the equation ρ=h/λ have on 40 What is the wavelength of an electron which has a velocity of 3.5 x 10 7 m/s? how we view matter or anything with momentum. (m e = 9.11x10 -31 kg) Slide 41 / 70 Slide 42 / 70 41 The de Broglie wavelength of a 12.0 gram bullet 42 The de Broglie wavelength of an electron with a traveling at the speed of sound is _________ m. velocity of 6.00 x10 6 m/s is __________ m. (m e = The speed of sound is 331 m/sec. 9.11x10 -31 kg)
Slide 43 / 70 Slide 44 / 70 43 What is the wavelength of an electron which has a 44 Why would the dual nature of matter make it velocity of 6.0 x 10 7 m/s? difficult to observe very small particles like (me = 9.11x10 -31 kg) electrons? Slide 45 / 70 Slide 46 / 70 45 What is the wavelength of an electron which has a 46 The de Broglie wavelength of a 10.0 gram whip velocity of 1.2 x 10 8 m/s? traveling at the speed of sound is _________ m. (me = 9.11x10 -31 kg) The speed of sound is 331 m/sec. Slide 47 / 70 Slide 48 / 70 47 The de Broglie wavelength of an electron with a 48 What is the wavelength of an electron which has a velocity of 1.30 x10 7 m/s is __________ m. (m e = velocity of 4.0 x 10 7 m/s? 9.11x10 -31 kg) (m e = 9.11x10 -31 kg)
Slide 49 / 70 Slide 50 / 70 49 Why do neutral atoms have the same numbers of 50 What about electrons allow them to be some of protons and electrons? the fastest traveling sub atomic particles? Slide 51 / 70 Slide 52 / 70 51 Why was it important to use alpha particles in 52 Based on Bohr’s model of the atom, why do you order to discover the neucleus, as opposed to think electrons were the first subatomic particle to gamma rays or beta particles? be discovered? Slide 53 / 70 Slide 54 / 70 53 Based off of the first experiments into the 54 As more and more protons enter the nucleus of an atom, increasing ratios of neutrons are needed. composition of atoms, why were neutrons the last Why do you think this is? particles to be discovered?
Slide 55 / 70 Slide 56 / 70 55 Why is it not possible for an electron to continue 56 Explain how emission spectra of gasses helped in a set orbit around the nucleus like a planet scientists to determine electrons traveled in around the sun? energy levels. Slide 57 / 70 Slide 58 / 70 57 Give one example of black body radiation that you 58 The binding energy of the hydrogen atom in its ground state is -13.6 eV. What is the energy when see in your everyday life. it is in the n = 4 state? Slide 59 / 70 Slide 60 / 70 59 What is the energy of the second excited state (n= 60 What is the energy of the ground state (n=1) of 3) of hydrogen? hydrogen?
Slide 61 / 70 Slide 62 / 70 61 How much energy does an electron in hydrogen 62 If an electron returns from the second excited state to ground state, what 3 Energies of photons need as it jumps from ground state to the second could it emit? excited state? Slide 63 / 70 Slide 64 / 70 63 If an electron returns from the second excited 64 A Hydrogen electron drops from its sixth excited state to ground state, what 3 frequencies of state back down to its forth excited state. photons could it emit? A What are the n values associated with these two states? How many different types of photons can it emit? B What is change in energy (in eV) associated with each C transition? What is the frequency associated with each of the emitted D electrons? What is the wavelength associated with eachof the emitted E electrons? What possible types of electromagnetic radiation are given F off during this transition? Slide 65 / 70 Slide 66 / 70 65 In state n = 1, the energy of the hydrogen atom is - 66 The wavelength of a ruby laser is 694.3 nm. What 13.58 eV. What is its energy in state n = 2? is the energy difference (in eV) between the two energy states involved in laser action?
Slide 67 / 70 Slide 68 / 70 67 If an electron returns from the second excited 68 If an electron returns from the second excited state to ground state, what 3 wavelengths (in nm) state to ground state, what 3 types of EM of photons could it emit? Radiation could it emit (if visible light is emitted, include the color)? Slide 69 / 70 Slide 70 / 70 69 The electron of a hydrogen atom makes a 70 A Hydrogen electron drops from its forth excited transition from the n = 5 state to the n = 2 state. state back down to its first excited state. What is the wavelength of the emitted photon? A What are the n values associated with these two states? How many different types of photons can it emit? B What is change in energy (in eV) associated with each C transition? What is the frequency associated with each of the emitted D electrons? What is the wavelength associated with eachof the emitted E electrons? What possible types of electromagnetic radiation are given F off during this transition?
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