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2. Calculate the energy associated with the light emitted by Rubidium and Cesium

2. Calculate the energy associated with the light emitted by Rubidium and Cesium

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter6: The Structure Of Atoms
Section: Chapter Questions
Problem 83SCQ
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2. Calculate the energy associated with the light emitted by Rubidium and Cesium

PP more stable energy levelš, energy that makes up visible light, the element produces a color. When heated, many of the elements in Groups 1A and 2A produce colorful flames produces a characteristic color. When the light from one of these flames passes throug! or crystal, a series of color lines appears. The spaces between lines appear dark. Such a. known as a spectrum, is used to identify elements in water, food, the sun, stars, and on otic The color of the light corresponds to the energy released when an excited electron drops to a lower energy state releasing energy in the visible portion of the electromagnetic spectrum. Blue light thus corresponds to the highest or greatest amount of energy released versus the red light which is lower in The energy of the light emitted can be estimated using Planck's equation for energy, E = hv = hc/1, where h is Planck's constant (6.63 x 10-34 J.s), c is the speed of light in a vacuum (2.998 x 108 m/s) v is the frequency in s-1, and 2 is the wavelength in meters. For example, the energy, E, of the ligh emitted by arsenic, As, can be estimated as follows, using Table 1, equations 1 and 2 below: energy. 16d mun boheq et neri aael ono ai oold 34, = 4. 19 × 10-7 m Convert wavelength to meters (equation 1): 2= 419 nm x 1 × 10° nm o e piock (6.63 x 10-34 J·s)(2.998 × 108 m/s) 4. 19 × 10-7 m aa q pnfbnoqeemoo erli nert aeel ow Calculate energy (equation 2): hc = 4. 19 × 10-19 J %3D E. Table 1. Cations and Colors they Produce in an lonizing Flame BLColor Color moA V Wavelength, nm idqs Name Symbol As elabp 419 Arsenic Boron Bariumng Blue nisheo io ae toime 478 B. b erit Bright Green Light green ainemple to 2G 516 pl lim 585noilitegh zirlT.s to 20i403 Isront oibs to aoihsc simots pnlase matieg oibon Ca be Calciumiveried oib Red-orange coilensios1er berlaildsies vCseoM.ECesium ne to InsmepCu(Il)OCopper(II) (halide) Blue-green (bluish green) Sw ea 481 1g Cl eptinslmiz अी aoe Ba benevo Pale violetw lerlt ainamso to 20i 403 1Sriaont taibs Blue-green (bluish green) w e 481 1g Cl Indium BASI SIG Cse Blue 451 gle BLonbeq Lithium Potassiumn pele eor of pnibe 404 sriedto 29the Crimson 671 edT elimie K. Mn(1I) ने Manganese(Il) Molybdenum Lilac 26 viisoibol Yellowish green 525 Yellowish green Intense yellow Pale bluish green 536 Na Sodium 568 Phosphorus Lead 458 Pale green 520 Rb Rubidium Pale violet 408 Sb Se Antimony Selenium Strontium Pale green Azure blue 563 473 Crimson 640
Transcribed Image Text:PP more stable energy levelš, energy that makes up visible light, the element produces a color. When heated, many of the elements in Groups 1A and 2A produce colorful flames produces a characteristic color. When the light from one of these flames passes throug! or crystal, a series of color lines appears. The spaces between lines appear dark. Such a. known as a spectrum, is used to identify elements in water, food, the sun, stars, and on otic The color of the light corresponds to the energy released when an excited electron drops to a lower energy state releasing energy in the visible portion of the electromagnetic spectrum. Blue light thus corresponds to the highest or greatest amount of energy released versus the red light which is lower in The energy of the light emitted can be estimated using Planck's equation for energy, E = hv = hc/1, where h is Planck's constant (6.63 x 10-34 J.s), c is the speed of light in a vacuum (2.998 x 108 m/s) v is the frequency in s-1, and 2 is the wavelength in meters. For example, the energy, E, of the ligh emitted by arsenic, As, can be estimated as follows, using Table 1, equations 1 and 2 below: energy. 16d mun boheq et neri aael ono ai oold 34, = 4. 19 × 10-7 m Convert wavelength to meters (equation 1): 2= 419 nm x 1 × 10° nm o e piock (6.63 x 10-34 J·s)(2.998 × 108 m/s) 4. 19 × 10-7 m aa q pnfbnoqeemoo erli nert aeel ow Calculate energy (equation 2): hc = 4. 19 × 10-19 J %3D E. Table 1. Cations and Colors they Produce in an lonizing Flame BLColor Color moA V Wavelength, nm idqs Name Symbol As elabp 419 Arsenic Boron Bariumng Blue nisheo io ae toime 478 B. b erit Bright Green Light green ainemple to 2G 516 pl lim 585noilitegh zirlT.s to 20i403 Isront oibs to aoihsc simots pnlase matieg oibon Ca be Calciumiveried oib Red-orange coilensios1er berlaildsies vCseoM.ECesium ne to InsmepCu(Il)OCopper(II) (halide) Blue-green (bluish green) Sw ea 481 1g Cl eptinslmiz अी aoe Ba benevo Pale violetw lerlt ainamso to 20i 403 1Sriaont taibs Blue-green (bluish green) w e 481 1g Cl Indium BASI SIG Cse Blue 451 gle BLonbeq Lithium Potassiumn pele eor of pnibe 404 sriedto 29the Crimson 671 edT elimie K. Mn(1I) ने Manganese(Il) Molybdenum Lilac 26 viisoibol Yellowish green 525 Yellowish green Intense yellow Pale bluish green 536 Na Sodium 568 Phosphorus Lead 458 Pale green 520 Rb Rubidium Pale violet 408 Sb Se Antimony Selenium Strontium Pale green Azure blue 563 473 Crimson 640
1. List the expected color of light and the corresponding wavelength (nm) associated with each cation (use Table 1). COLL C: Rubidium, Rb* 0ale violet G.CCUK Ceen anotelualsn suoy wone ihono ilut soS edi st Cesium, Cs 2. Calculate the energy associated with the light emitted by each of the elements above (sue equations 1 and 2). Rubidium, Rb* Cesium, Cs* 4 awominl
Transcribed Image Text:1. List the expected color of light and the corresponding wavelength (nm) associated with each cation (use Table 1). COLL C: Rubidium, Rb* 0ale violet G.CCUK Ceen anotelualsn suoy wone ihono ilut soS edi st Cesium, Cs 2. Calculate the energy associated with the light emitted by each of the elements above (sue equations 1 and 2). Rubidium, Rb* Cesium, Cs* 4 awominl
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