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Chemistry 2014-15 Houston Chapter 4 Arrangement of Electrons in Atoms Classwork 1. Define the vocabulary on page 88. Section 1 – The Development of a New Atomic Model Reading Guide 1. List 6 forms of electromagnetic radiation. 2. All forms of electromagnetic radiation form the ________________. 3. All forms of electromagnetic radiation move at a constant speed of _____________ through a vacuum. 4. _________ is the distance between corresponding points on adjacent waves. 5. What is the symbol for wavelength? 6. Frequency is defined as _______________________________________. 7. What is the symbol for frequency? 8. Give the equation that relates frequency and wavelength mathematically. 9. Describe the photoelectric effect. 10. A _________ of energy is the minimum quantity of energy that can be lost or gained by an atom. 11. Max Planck proposed the following relationship between a quantum of energy and the frequency of radiation: E = hv. List and define each variable. 12. Who expanded Planck’s ideas by introducing the idea that electromagnetic radiation has a dual wave-particle nature? 13. Einstein called the quantum of energy produced by light ________. 14. The lowest energy state of an atom is its _______ 15. When an atom has a higher potential energy than it has in its ground state it is in an _________ state. 16. Who proposed that electrons travel in “orbits” or paths around the nucleus? End of Section Review – Short Answers: Page 103: # 1, 2, 3, 4, 6a Section 1 Review – Short Answers Page 124: # 1, 4, 7, 8 Section 2 – The Quantum Model of the Atom Reading Guide 1. Who suggested that electrons be considered waves confined to the space around an atomic nucleus? 2. State the Heisenberg uncertainty principle. 3. In 1926, who used the hypothesis that electrons have a dual wave-particle nature to develop an equation that treated electrons as waves. 4. __________ describes mathematically the wave properties of electrons and other very small particles. 5. Solutions to the Schodinger wave equation are known as __________. Chemistry 2014-15 Houston 6. The quantum theory determines that wave functions give only the _________ of finding an electron in a given place around the nucleus. 7. According to quantum theory electrons exist in certain regions called ________. 8. What are quantum numbers? 9. The _________indicates the main energy level occupied by the electron and is symbolized by the letter ______. 10. The ___________ indicates the shape of the orbital and is symbolized by the letter ______. 11. What is the shape of a s orbital (see figure 13)? 12. What is the shape of a p orbital (see figure 13)? 13. What is the shape of d orbitals (see figure 13 & 14)? 14. How many sublevels are in the 1st energy level? What is it’s orbital called? 15. How many sublevels are in the 2nd energy level? What are its orbitals called? 16. How many sublevels are in the 3rd energy level? What are its orbitals called? 17. How many sublevels are in the 4th energy level? What are its orbitals called? 18. How would you designate the p sublevel in the third main energy level? 19. The _______ indicates the orientation of an orbital around the nucleus and is symbolized by the letter ___. 20. The ________ has only two possible values which indicate the two fundamental spin states of an electron in an orbital. 21. A single orbital can hold a maximum of _____ electrons , but the electrons must have _____ spin states. End of Section Review – Short Answers: Page 110: # 1, 2, 3, 4 Section 2 Review – Short Answers Page 124 - 125: # 16, 18, 19 a,b, 21, 22, 23, 24, 25 Section 3 – Electron Configurations End of Section Review – Short Answers: Page 122: # 1, 2, 3, 4, 5 Section 2 Review – Short Answers Page 125: #26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 38