Chemistry 4.1 Notes Power Point
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Chemistry 4.1 Notes Power Point Fill in the blanks as we discuss the power point presentation. Use these as your study notes for this section of the chapter.
Slide 2: Studying light helps us understand matter and the arrangement of electrons in the atom. 1)Light is one form of _______________________________ 2) _______________________________ is energy that travels at the speed of light in the form of a wave.
Slide 3 3)List 7 forms of electromagnetic radiation in order of increasing energy. a) ______________________________________________________________ b) ______________________________________________________________ c) ______________________________________________________________ d) ______________________________________________________________ e) ______________________________________________________________ f) ______________________________________________________________ g) ______________________________________________________________
Slide 4 4)What form of electromagnetic radiation has the lowest energy and the longest wavelength? _______________________________ 5) _______________________________ is a form of energy that has a short wavelength and lower energy than the energy you answered in number 9.
Slide 5 6) _______________________________ energy we know as heat. 7) _______________________________ shows the colors of the rainbow.
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8) _______________________________ light gives us sun burns, sun tans, and cancer.
Slide 6 9) _______________________________ rays have enough energy to penetrate tissue. 10) _______________________________rays are the most energetic with the shortest wave length.
Slide 7 11)All forms of electromagnetic radiation combined is called the ___________________ spectrum. Slide 8 12) _______________________________radiation travels as a wave. 13) _______________________________ (λ) is the distance from crest to crest or trough to trough on a wave. 14) _______________________________ (f) is the number of waves that pass a point in a certain amount of time. It is measured in units called _______________________________ (Hz). 15)Draw a “typical” wave form. Label the following parts: crest, trough, wavelength.
16)What is the speed of electromagnetic radiation? ______________________________ 17)Give an equation that shows the relationship between the speed of light, frequency, and wavelength. _______________________________
Slide 9 18)c = _______________________________
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19) _______________________________and _______________________________ are inversely proportional. 20) _______________________________ is measured in Hz and __________________ is measured in length units (cm, m, km etc.)
Slide 10: Work this wave problem. 21)A type of electromagnetic radiation has a wavelength of 6594 A. What is its frequency?
Slide 11: Another problem to work. 22) A type of electromagnetic radiation has a frequency of 1.34 x 106 Hz. A)What is its velocity? B)What is its wavelength? C)What type of electromagnetic radiation is it?
Slide 12: 23) What two discoveries about light help us understand matter better? _______________________________ and _______________________________ 24)What two scientist proposed these ideas? _______________________________ and _______________________________
Slide 13 25)The photoelectric effect says ____________________________________________
Slide 14 26)State three ideas of the photoelectric effect. a) ______________________________________________________________ b) ______________________________________________________________ c) ______________________________________________________________
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Slide 15 27)Give two ideas of the quantum theory. a) ______________________________________________________________ b) ______________________________________________________________
Slide 16 28)Give four ideas of photons. a) ______________________________________________________________ b) ______________________________________________________________ c) ______________________________________________________________ d) ______________________________________________________________ 29)What is the value of h? _______________________________ 30)What is the name of h? _______________________________
Slide 17 31)Give an equation that tells energy if you know the wavelength of electromagnetic radiation. _______________________________
Slide 18: Energy of Photons, Problems. 32)A photon of electromagnetic radiation has a frequency of 98.7MHz. What is the energy of a photon of that electromagnetic radiation?
Slide 19: More Energy Problems. 33)Electromagnetic radiation has a wavelength of 6450 A. What is the energy of a photon of this radiation?
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Slide 20: Energy Problems Again. 34)A photon of electromagnetic radiation has an energy of 2.10 x 10-11 j. What is the frequency of the energy? What is the wavelength of the energy?
Slide 21 35) _______________________________ give different colors when heated in a flame. 36)Different _______________________________ indicate different _______________________________ values.
Slide 22 34)White light that passes through a prism is split into different ____________________ 35) _______________________________ is the most energetic color of visable light and _______________________________is the least energetic color of visable light. 36)Different ____________________ of light have different wavelengths.
Slide 23 37)Light observed through a diffraction grating produces a ____________________ line spectrum. 38)Instead of a ____________________ spectrum, like you’d see of white light through a prism, when you look at light from an element you only see bright ____________________ of color. 39)Each ____________________ has its own characteristic bright line spectrum. 40)Each ____________________ of color shows its own distinct wavelength of light. 41)Only ____________________ of these specific wavelengths are emitted from the hydrogen atoms. 42)What colors do you see in a hydrogen bright line spectrum? ____________________, ____________________, ____________________, ____________________. MNethercott
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43)Which of these colors represent the least energy? ____________________; the most energy? ____________________
Slide 24: Energy Level Transitions and Bright line Spectra of Hydrogen. _________________________ are regions in the electron cloud where electrons are most likely found. Hydrogen has _________________________ electrons in its first energy level when it is in its ground state. ____________________________ is when all of the electrons in an atom are in their lowest possible energy levels. If the atom absorbs a _________________________ that has enough energy, the electron will move to a higher ______________________ in the atom. When one or more ________________________ are at a higher than normal _______________________ in the atom, the atom is said to be in a ____________________________ state. The electron in this higher energy _______________________ is not stable, and it moves to a lower energy level. When the electron moves to a lower energy level a _____________________ of specific energy is released (emitted) from the atom. When the ________________________ falls to a lower ___________________ level in the atom it is called an energy level transition. Electrons making a transition from a higher energy level to the first energy level produce __________________________ radiation. Electron energy level transitions to the second energy level produce _______________________ light When electrons fall to the ___________________ energy level __________________________light is produced. Thus, three types of electromagnetic radiation can be emitted from hydrogen atoms
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Slide 25 44)Bright line spectra in the ____________________ and ____________________ wavelengths were also discovered. 45)The ____________________ Series is the name of the bright line spectrum of hydrogen in the ultraviolet region of the electromagnetic spectrum. 46) The ____________________ Series is the name of the bright line spectrum of hydrogen in the infrared region of the electromagnetic spectrum.
Slide 26 47)Fill in the following table about the Lyman, Balmer, and Paschen Series. Series Type of Radiation Energy Level Transition
51)When an electron “falls” (makes a transition) from a higher energy level to the first energy in the hydrogen atom, which type of electromagnetic radiation is produced? _________________________________ What is the name of the name of the series produced by these transitions? _____________________ 52)When an electron “falls” (makes a transition) from a higher energy level to the second energy in the atom, which type of electromagnetic radiation is produced? ________________________________________ What is the name of the name of the series produced by these transitions? _____________________ 53)When an electron “falls” (makes a transition) from a higher energy level to the third energy in the atom, which type of electromagnetic radiation is produced? ________________________________________ What is the name of the name of the series produced by these transitions? _____________________
Slide 27
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54)What do bright line spectra tell us about the electron arrangement of atoms? a) b) c) d)
__________________________________________ __________________________________________ __________________________________________ __________________________________________
Slide 28 55)Who was Niels Bohr? ________________________________ 56)List four ideas about the Bohr Model of the atom. a) __________________________________________ b) __________________________________________ c) __________________________________________ d) __________________________________________ Slide 29 58)List, Draw, and label five models of the atom. from oldest to newest.
MNethercott
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Arrange them in order
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Slide 2: Studying light helps us understand matter and the arrangement of electrons in the atom. 1)Light is one form of _______________________________ 2) _______________________________ is energy that travels at the speed of light in the form of a wave.
Slide 3 3)List 7 forms of electromagnetic radiation in order of increasing energy. a) ______________________________________________________________ b) ______________________________________________________________ c) ______________________________________________________________ d) ______________________________________________________________ e) ______________________________________________________________ f) ______________________________________________________________ g) ______________________________________________________________
Slide 4 4)What form of electromagnetic radiation has the lowest energy and the longest wavelength? _______________________________ 5) _______________________________ is a form of energy that has a short wavelength and lower energy than the energy you answered in number 9.
Slide 5 6) _______________________________ energy we know as heat. 7) _______________________________ shows the colors of the rainbow.
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8) _______________________________ light gives us sun burns, sun tans, and cancer.
Slide 6 9) _______________________________ rays have enough energy to penetrate tissue. 10) _______________________________rays are the most energetic with the shortest wave length.
Slide 7 11)All forms of electromagnetic radiation combined is called the ___________________ spectrum. Slide 8 12) _______________________________radiation travels as a wave. 13) _______________________________ (λ) is the distance from crest to crest or trough to trough on a wave. 14) _______________________________ (f) is the number of waves that pass a point in a certain amount of time. It is measured in units called _______________________________ (Hz). 15)Draw a “typical” wave form. Label the following parts: crest, trough, wavelength.
16)What is the speed of electromagnetic radiation? ______________________________ 17)Give an equation that shows the relationship between the speed of light, frequency, and wavelength. _______________________________
Slide 9 18)c = _______________________________
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19) _______________________________and _______________________________ are inversely proportional. 20) _______________________________ is measured in Hz and __________________ is measured in length units (cm, m, km etc.)
Slide 10: Work this wave problem. 21)A type of electromagnetic radiation has a wavelength of 6594 A. What is its frequency?
Slide 11: Another problem to work. 22) A type of electromagnetic radiation has a frequency of 1.34 x 106 Hz. A)What is its velocity? B)What is its wavelength? C)What type of electromagnetic radiation is it?
Slide 12: 23) What two discoveries about light help us understand matter better? _______________________________ and _______________________________ 24)What two scientist proposed these ideas? _______________________________ and _______________________________
Slide 13 25)The photoelectric effect says ____________________________________________
Slide 14 26)State three ideas of the photoelectric effect. a) ______________________________________________________________ b) ______________________________________________________________ c) ______________________________________________________________
MNethercott
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Slide 15 27)Give two ideas of the quantum theory. a) ______________________________________________________________ b) ______________________________________________________________
Slide 16 28)Give four ideas of photons. a) ______________________________________________________________ b) ______________________________________________________________ c) ______________________________________________________________ d) ______________________________________________________________ 29)What is the value of h? _______________________________ 30)What is the name of h? _______________________________
Slide 17 31)Give an equation that tells energy if you know the wavelength of electromagnetic radiation. _______________________________
Slide 18: Energy of Photons, Problems. 32)A photon of electromagnetic radiation has a frequency of 98.7MHz. What is the energy of a photon of that electromagnetic radiation?
Slide 19: More Energy Problems. 33)Electromagnetic radiation has a wavelength of 6450 A. What is the energy of a photon of this radiation?
MNethercott
Page 4
11/16/09
Slide 20: Energy Problems Again. 34)A photon of electromagnetic radiation has an energy of 2.10 x 10-11 j. What is the frequency of the energy? What is the wavelength of the energy?
Slide 21 35) _______________________________ give different colors when heated in a flame. 36)Different _______________________________ indicate different _______________________________ values.
Slide 22 34)White light that passes through a prism is split into different ____________________ 35) _______________________________ is the most energetic color of visable light and _______________________________is the least energetic color of visable light. 36)Different ____________________ of light have different wavelengths.
Slide 23 37)Light observed through a diffraction grating produces a ____________________ line spectrum. 38)Instead of a ____________________ spectrum, like you’d see of white light through a prism, when you look at light from an element you only see bright ____________________ of color. 39)Each ____________________ has its own characteristic bright line spectrum. 40)Each ____________________ of color shows its own distinct wavelength of light. 41)Only ____________________ of these specific wavelengths are emitted from the hydrogen atoms. 42)What colors do you see in a hydrogen bright line spectrum? ____________________, ____________________, ____________________, ____________________. MNethercott
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43)Which of these colors represent the least energy? ____________________; the most energy? ____________________
Slide 24: Energy Level Transitions and Bright line Spectra of Hydrogen. _________________________ are regions in the electron cloud where electrons are most likely found. Hydrogen has _________________________ electrons in its first energy level when it is in its ground state. ____________________________ is when all of the electrons in an atom are in their lowest possible energy levels. If the atom absorbs a _________________________ that has enough energy, the electron will move to a higher ______________________ in the atom. When one or more ________________________ are at a higher than normal _______________________ in the atom, the atom is said to be in a ____________________________ state. The electron in this higher energy _______________________ is not stable, and it moves to a lower energy level. When the electron moves to a lower energy level a _____________________ of specific energy is released (emitted) from the atom. When the ________________________ falls to a lower ___________________ level in the atom it is called an energy level transition. Electrons making a transition from a higher energy level to the first energy level produce __________________________ radiation. Electron energy level transitions to the second energy level produce _______________________ light When electrons fall to the ___________________ energy level __________________________light is produced. Thus, three types of electromagnetic radiation can be emitted from hydrogen atoms
MNethercott
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Slide 25 44)Bright line spectra in the ____________________ and ____________________ wavelengths were also discovered. 45)The ____________________ Series is the name of the bright line spectrum of hydrogen in the ultraviolet region of the electromagnetic spectrum. 46) The ____________________ Series is the name of the bright line spectrum of hydrogen in the infrared region of the electromagnetic spectrum.
Slide 26 47)Fill in the following table about the Lyman, Balmer, and Paschen Series. Series Type of Radiation Energy Level Transition
51)When an electron “falls” (makes a transition) from a higher energy level to the first energy in the hydrogen atom, which type of electromagnetic radiation is produced? _________________________________ What is the name of the name of the series produced by these transitions? _____________________ 52)When an electron “falls” (makes a transition) from a higher energy level to the second energy in the atom, which type of electromagnetic radiation is produced? ________________________________________ What is the name of the name of the series produced by these transitions? _____________________ 53)When an electron “falls” (makes a transition) from a higher energy level to the third energy in the atom, which type of electromagnetic radiation is produced? ________________________________________ What is the name of the name of the series produced by these transitions? _____________________
Slide 27
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54)What do bright line spectra tell us about the electron arrangement of atoms? a) b) c) d)
__________________________________________ __________________________________________ __________________________________________ __________________________________________
Slide 28 55)Who was Niels Bohr? ________________________________ 56)List four ideas about the Bohr Model of the atom. a) __________________________________________ b) __________________________________________ c) __________________________________________ d) __________________________________________ Slide 29 58)List, Draw, and label five models of the atom. from oldest to newest.
MNethercott
Page 8
Arrange them in order
11/16/09
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