Phys.219_Lec.03_2012 - Lecture 3-1 Physics 219 Question 1...

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Lecture 3-1 Physics 219 – Question 1 – Jan.18.2012. Three point charges are arranged at the corners of a square as shown. What is the direction of the electric field at the remaining corner? (Take Q > 0.) a) toward the lower right b) toward the upper left c) upward d) to the right e) none of the above -Q Q Q
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Lecture 3-2 Formation of Water Molecules The chemical formula for water is: 2 HO O H H Water molecule is formed by ionic bond. That means the following: The single electrons from the two Hydrogen atoms transfer to the Oxygen atom. Oxygen becomes a doubly negative ion, the Hydrogen atoms turn into positive ions (protons). The Carbon and H ions attract each other and form a neutral molecule. The electron charges and the proton charges are slightly displaced from each other. C H H + + e e e pq d = + _ p G d O
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Lecture 3-3 Electric Dipole An electric dipole consists of two separated point charges that have the same magnitude but opposite signs. The product of one of the magnitude of one of the charges and the distance between the charges is called the dipole moment . pd q = G G Many molecules such as H 2 O and HCl have permanent dipole moments and are called polar molecules. The dipole moment is a vector which points from the negative to the positive charge.
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Lecture 3-4 Periodic Table of the Elements An atom is describe be 2 quantum numbers: n = 1, 2, 3…… l = n-1, n-2, …. .
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This note was uploaded on 02/05/2012 for the course PHYS 219 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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Phys.219_Lec.03_2012 - Lecture 3-1 Physics 219 Question 1...

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