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
Premium Chemical element Atomic number Periodic table
[pic]Essay #5: Division/Classification ASSIGNMENT Write a 3-page essay classifying different types. The essay must focus on types of a specific object or person. The essay is not intended to be an inventory of descriptions‚ but rather a fun analysis that leads to an overall conclusion about what you discovered in the details of each type. Requirements • 3 pages • Introduction (creative hook/lead and use Adios “Encircling” to get into the body of the essay—a
Premium Writing Pizza
Were the Romans welcome in Britain? When emperor Claudius invaded Britain‚ he did something very smart. Namely‚ showing the people of Britain how good the life in the Roman empire was. He did this by giving the sons of local leaders‚ a trip to Rome‚ so they could see how well-civilised and flourishing the Roman people were. After being overwhelmed by all this wealth and culture‚ a lot of British tribes went to collaborate with the Romans. However‚ there also were quite some tribes which did
Premium Roman Empire
Systems Media Table Comparison HCS/482 – Health Care Informatics Systems Media Table: Comparison |System |Purposes |Examples |Uses | |Word processor |The purpose of a word processor |Microsoft Windows created MS |A word processor allows the user| | |is to create text documents to |Word and
Premium Word processor Decision support system Health care
Introduction Table tennis is a game that is played with wooden paddles‚ a net‚ and a cellulite ball‚ usually played in the basement with an opponent‚ with the distinctive noises when a ball was struck. It is a game that is quite similar to lawn tennis. It is played by two or four players. Like in lawn‚ the table has a net‚ which divides the playing area into two portions. “Ping-pong” is the trademark name often called to the name of table tennis. When free rein at private-enterprise levels‚ this
Free Game Play United States
A CCOUN TlNG FUNDAMENTALS FOR CONS TRUC TlON DANIEL W. HALPIN‚ BOLIVAR A. SENIOR Copyright 02009 by John Wiley & Sons‚ Inc. All rights reserved APPENDIX C COMPOUND INTEREST TABLES 275 P1: OTA/XYZ P2: ABC JWBT106-APP-C 276 JWBT106-Halpin June 26‚ 2009 8:56 Printer: Sheridan Books COMPOUND INTEREST TABLES TABLE C.1 0.25% Compound Interest Factors Single Payment 0.25% Uniform Payment Series Compound Amount Factor Present Worth Factor Sinking Fund Factor Capital Recovery Factor
Premium Harshad number Time value of money Compound interest
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
Premium The A-Team Team
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 |
Premium Psychology Theory Philosophy
1 18 IUPAC Periodic Table of the Elements 1 H 2 He helium hydrogen [1.007; 1.009] 2 3 4 Li beryllium 9.012 11 14 15 16 17 4.003 5 atomic number Be lithium [6.938; 6.997] 13 Key: 6 7 8 9 10 O F Ne boron carbon nitrogen oxygen fluorine neon [10.80; 10.83] B [12.00; 12.02] [14.00; 14.01] [15.99; 16.00] 19.00 20.18 12 13 14 15 16 17 18 Na
Premium Chemical element Isotope Trigraph
The Development of the Periodic Table Although Dmitri Mendeleev is often considered the ‘father’ of the periodic table‚ the work of many scientists contributed to its present form. Between 1817-1829‚ Johann Dobereiner began to group elements with similar properties in to groups of three or triads. This began when he noticed that the atomic weights of strontium (Sr) were halfway between Calcium (Ca) and Barium (Ba). He stated that nature contained triads of elements in which the middle element
Premium Chemical element Periodic table Chemistry