Unit 1 – Lesson 1 Chemistry Key Questions 1. Element Standard Notation # Of Electrons # Of Protons # Of Neutrons Sodium 23 11 Na 11 11 12 Chromium 24 Ca 26 26 27 ? Phosphorus 32 P 15 15 16 2. Fireworks; Which metals burn to produce these colours? Red – Lithium (Sr) Blue – Cesium (Cs) Pink – Potassium (K) Yellow/Green – Copper (Cu) Orange – Carbon (Ca) 3. Let’s say that the three bottles contain Fe(NO3)3‚ BaCl‚ and AgNO3. These are Iron (III) Nitrate‚ Barium Chloride
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oceans rising by about 60-65 meters. This would also cause the wildlife to be killed affecting the whole world’s food chain. Antarctica is rich in minerals and this to most countries means more money. Many different minerals such as Iron ore‚ chromium‚ copper‚ gold‚ nickel and platinum have been found in Antarctica along with a couple more in very small amounts. There is predicted to be oil in Antarctica which will become very important in the next 100 years as we are slowly running out‚ soon
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I enjoy a cup of organic fair trade coffee in the mornings. I have done this for a few months now. After I drink a big glass of water‚ I follow-up with the best organic coffee. For now‚ it has replaced my morning cup of green tea. Studies on caffeine continue and as each one comes to light‚ drinking coffee is no longer the dreaded bearer of health problems. For years‚ I didn’t drink coffee I avoided the caffeine. Because I like to keep my body clean and mean and I was under the impression the
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The native Amerindian population of Cuba began to decline after the European discovery of the island by Christopher COLUMBUS in 1492 and following its development as a Spanish colony during the next several centuries. Large numbers of African slaves were imported to work the coffee and sugar plantations‚ and Havana became the launching point for the annual treasure fleets bound for Spain from Mexico and Peru. Spanish rule eventually provoked an independence movement and occasional rebellions that
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QUALITY OF BOTTLED WATER PRODUCED BY WATER REFILLING STATIONS TABLE OF CONTENTS APPROVAL SHEET i ACKNOWLEDGEMENT ii LIST OF TABLES v ABSTRACT vi CHAPTER I INTRODUCTION Background of the Study 1 Related Studies 3 Statement of the Problem 6 Objectives 6 Conceptual Framework 7 Significance of the Study 9 Scope and Delimitation 9 Definition of Terms 9 CHAPTERII METHODOLOGY
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Chemistry 11 Final Examination Review - Answers Part A - True or False. Indicate whether each of the following statements is true or false. Correct the false statements. F 1. The mass of an electron is equal to the mass of a proton. The mass of an electron is less than the mass of a proton. T 2. The mass of a proton is approximately equal to the mass of a neutron. T 3. The atomic number represents the number of protons in a nucleus. T 4. The proton has a mass of approximately
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Role of Engineers Engineering in Environmental and Technological Contexts • Engineers are designers who use scientific principles to optimize their design. • Engineers can use systematic‚ objective engineering analysis and design techniques. • Engineers are innovators. • Engineer have the much potential to impact global sustainability through the product and processes designed. • Engineers are charged to be “dedicated to the protection of the public health‚ safety‚ and welfare.” Ajith de Alwis
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with non-metallic elements except for nitrogen‚ oxygen‚ noble gases‚ silicon and halogens. It oxides them to their highest oxidation states(3) as acids with the formation of nitrogen dioxide for concentrated acid and nitric oxide for dilute acid. Chromium (Cr)‚ iron (Fe) and aluminium (Al) dissolve in dilute nitric acid‚ which the concentrated acid forms a metal oxide layer that protects the metal from further oxidation‚ and it is called passivation. Nitric acid can be made in laboratory or industrially
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CHE 140 Name__Chesi Spriggs First Hour Exam Potentially useful information 1000 g = 1 kg 1000 mL = 1 L 1 in = 2.54 cm 1 mL = 1 cm3 D = m/v Select the best choice for the following questions. ___e___ 1. A hypothesis is a(n) a. formulation of principles based on facts. b. modification of a theory. c. organized body of knowledge. d. tentative explanation of observations. e. None of the above. __b___ 2. The initial success of the Bohr theory was based
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NUTRITION‚ HEALTH AND WELLNESS SOPHIA HENRY ILAB: WEEK SEVEN TOPIC: FIRST YEAR OF INFANTS LIFE DATE: JUNE 19TH‚ 2012 THE FIRST YEAR OF INFANTS LIFE The first year of life is one of the most critical stages in childhood development. From the moment they open their eyes‚ newborns undergo dramatic physical and mental changes. During the first 12 months infants should be examined regularly to determine proper development and identify any health problems. Early detection and treatment of potential
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