Promethium‚ Pm‚ is the 61st element on the Periodic Table. It was discovered in 1945 by Jacob A. Marinsky. It’s a metal‚ and named after the Greek God Prometheus. It is not naturally occurring‚ but can survive outside of a lab. Promethium has an atomic number of 61‚ which is the number of protons. Its atomic mass‚ protons+neutrons‚ is 145u. It is an isotope. This means that it has a different number of neutrons (84) than the number of electrons and protons (61). Every element changes states
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in the d-block and it is a transition metal. Technetium is in the 7th group in the periodic table because it has 1 electron on its last shell. Also it is in the 5th period in the periodic table because it has 5 shells. Number of energy levels of Technetium is 5. Its electron shells are 2‚8‚18‚14‚1 as it is in the picture. Firstly‚ Russian chemist Dmitri Mendeleev‚ who is the creator of the periodic table‚ predicted Technetium’s existence. He called it eka-manganese because there was a missing element
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Pool Parlor‚ by Jacob Lawrence is truly a unique piece of art. Lawrence’s work showcases a 1940’s pool hall in Harlem‚ New York. This painting intrigued me in several ways; as a young child‚ I spent a large amount of time in pool halls due to my family being national competitive pool players. I also enjoy the Jazz and Blues genre of music that has roots in the Harlem community. Lawrence does a great job in capturing the atmosphere of a busy pool hall. Just looking at the painting‚ makes me hear the
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Architecting the Ethernet and Hash Tables Using SABER A BSTRACT Efficient algorithms and compilers have garnered tremendous interest from both experts and hackers worldwide in the last several years. Given the current status of virtual algorithms‚ steganographers obviously desire the analysis of public-private key pairs‚ which embodies the natural principles of hardware and architecture. We demonstrate not only that red-black trees and fiber-optic cables can collude to accomplish this goal‚ but that
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literature. At least two must be from peer-reviewed journals. The articles or books may be theory articles‚ research articles‚ or a combination. Develop a table to identify similarities and difference in the theory discussions. Format your table consistent with APA guidelines. University of Phoenix Material Week Three Sample Table Table 1 Teams and Organization Structure Authors Article Type and Context Dynamics Differentiation Integration
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Associate Level Material Appendix C Fill in the table below by classifying each philosophy as either teacher-centered or student-centered authority. Next‚ identify the main characteristics of that philosophy. (The first one is completed for you as an example.) Once you have completed the table‚ answer the questions below. Educational Philosophies Table |Philosophy |Teacher- or Student-Centered |Characteristics |
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December 5‚ 1945‚ Flight 19‚ a group of five avenger jets took off from Ft. Lauderdale for a routine training mission. The flight was to drop dummy bombs near Bimini‚ just 56 miles from base‚ then proceed east for 67 miles following a heading of 91 degrees‚ then turn north-northwest 346 degrees for 73 miles‚ and then southwest back to the base to finish the triangle. (This is how the Bermuda Triangle found its name as well!) (Quasar‚ 2005)Tragically‚ the fourteen members of flight 19 never made it home
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The Welcome Table Tawanda Richardson English 125: Introduction to Literature Amber Anaya July 15‚ 2012 The short story I decided to write about was‚ “The Welcome Table” by Alice Walker. As I was reading this story‚ the theme I decided on was Religion. The Welcome Table is a wonderful story that is filled with several symbolisms‚ such as religion‚ racism and finally the reward of getting to meet her Jesus‚ so she can tell him all about her struggles. Throughout the story one can tell that
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thinking about winterizing your pool‚ especially if you live somewhere where it gets below freezing. Winterizing your pool will protect your pool equipment and make it easier for you to get your pool ready again next spring. #1 Check Your Chemicals Before you shut down your pool‚ you need to test the chemical levels of your pool using a chemical testing kit. You are going to want to test the calcium hardness‚ alkalinity and pH levels. If the chlorine levels in your pool are too high‚ it could mess-up
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“Whistle! Point! Clear the Pool!” is a phrase that completely dominates my life. For the past two summers I have been blessed worked as a lifeguard for AMS Pools. This year I was lucky enough to compete in the lifeguard Olympics in my area within the company. Lifeguard Olympics are an organized set of events and relays where we compete to show off‚ which team has the best overall lifeguarding skills and techniques. Each event has some type of scenario in which the lifeguard has to rescue the Guest
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