ATOMIC PHYSICS The nuclear atom All matter is made up of atoms which consist of a central nucleus‚ surrounded by electrons. Inside the nucleus are protons and neutrons. Particle Relative mass Charge Location Proton 1840 + Nucleus Neutron 1840 0 Nucleus Electron 1 - Outside nucleus Proton or atomic number (Z) This is the total number of protons in the nucleus of an atom. Nucleon or mass number (A) This is the total number of protons and neutrons in the nucleus of an atom. Note: a nucleon
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23.0 4 Be 9.0 Lithium 3 Li 6.9 Hydrogen 1 H 1.0 19 K 39.1 Calcium 20 Ca 40.1 Sodium 37 Rb 85.5 Strontium 38 Sr 87.6 Potassium 55 Cs 132.9 Barium 56 Ba 137.3 Rubidium Radium 87 Fr (223) Francium 88 Ra (226) Caesium Thorium 92 U 238.0 Protactinium Uranium Neptunium 93 Np (237) Promethium 91 Pa 231.0 Praseodymium Neodymium 90 Th 232.0 Cerium 61 Pm
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Ethics key words and concepts Ethics 1: truth telling Duty of candour: This is the duty of being honest and straightforward in attitude and speech. The moral tension between beneficence and respect for autonomy: The principle of nonmaleficence is translated from ‘first‚ do no harm’ (Hippocratic oath) and what intends to say that if you can not do any good without causing harm then do not do it at all. The principle of beneficence is understood as the first principle of morality and follows
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Israel Science and Technology Homepage Home Search About Contact Bookmark Sort List By Atomic Number Atomic Weight Name Symbol Periodic group‚ Electron configuration Melting point Boiling point Density Ionization energy Abundance in Earth Year of discovery Hebrew Name List of Periodic Table Elements Sorted by Atomic Number Click a column title‚ such as Symbol‚ to sort the table by that item. No. Atomic Weight Name Sym. M.P. ( °C ) B.P. ( °C ) Density* (g/cm3) Earth crust (%)* Discovery
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GENERAL CERTIFICATE OF SECONDARY EDUCATION GATEWAY SCIENCE ADDITIONAL SCIENCE B Unit 1 Modules B3 C3 P3 FOUNDATION TIER THURSDAY 14 JUNE 2007 Calculators may be used. Additional materials: Pencil Ruler (cm/mm) F B623/01 *CUP/T30055* Afternoon Time: 1 hour INSTRUCTIONS TO CANDIDATES • • • • • • • Write your name‚ Centre Number and Candidate Number in the boxes above. Answer all the questions. Use blue or black ink. Pencil may be used for graphs and diagrams only. Read each question
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Answers Chapter 1 1 a) 8 m/s 2 a) 10 500 m (10.5 km) b) 105 000 m (105 km) c) 630 000 m (630 km) 4000 s (Snails can actually move faster than this! At a more realistic 4 mm/s (0.004 m/s) it would only take the snail 400 s or 6 minutes 40 seconds.) 4 a) graph D b) graph C c) graph A d) graph B a) 8m distance = = 32 m/s 0.25s time The car is moving at constant velocity (speed). 5 IGCSE Physics Answers – Section A 3 6 gradient
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Japanese Medical Beliefs Alison Sorrells ANT 101 Instructor Patel July 28‚ 2010 Japanese Medical Beliefs Medicine is all around us. It comes in all forms and all types of beliefs. Each person has their own beliefs on what medicine can do to or for the body. No matter what country one visits‚ there will be a medical office to assist‚ however their views may vary that what one may be use to. In Japan‚ things are no different; however‚ Japan has some beliefs that contrast other countries. The Japanese
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Vonnegut ’s Changing Women What follows is an argument to the effect that‚ in the novels written before 1973‚ Vonnegut ’s female characters generally are presented negatively‚ either as pro-authority anti-individualists or as helpless or male-manipulated victims who never "grow" in either a personal or literary sense. In addition I maintain that‚ in at least two of Vonnegut ’s later novels‚ certain female characters exercise individuality in their own existences and effect positively the awareness
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Hydraulic Fracking Research Paper and Why the process of Fracking is bad for our environment Kimberly Ricker Park University Abstract This paper explores the hydraulic fracturing process‚ exactly what it is‚ what the fracturing process does to the earth and the surrounding environment in addition‚ to the consequences. Hydraulic fracturing is fracturing of rock by pressurization. This process by which oil and natural gas can be forced from the earth. The
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NUCLEAR ENERGY Nuclear energy is the energy contained in the centre ‚ or nucleus of an atom. The nucleus is the most powerful source of energy that exist. Nuclear energy is use in scientific research and in medicine treatments. It powers satellites and submarines‚ and it is used to produce electricity. People have also put nuclear energy to destructive uses through the creation of weapons.1 Nuclear energy also called ATOMIC ENERGY‚ energy
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