the element? Selenium was discovered by Jons Jacob Berzelius in 1817. How was the element discovered? Selenium was discovered by Jons Jakob Berzelius in 1817. In 1817‚ he was studying the chemicals used in making sulfuric acid‚ but they got selenium from a red-brown sediment which collected at the bottom of the chambers in the particular plant. At first he thought it was the element tellurium and tellurium is a rare element‚ so he brought it back to his laboratory. After studying the element‚ Berzelius
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answer these questions‚ we must first examine the cause and formation of acid rain‚ as well as understand ways to decrease or prevent its formation. Formation of acid rain. Acid deposition‚ more commonly known as acid rain‚ occurs when emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) react in the atmosphere with water‚ oxygen‚ and oxidants to form acidic compounds. This mixture forms a mild solution of sulfuric and nitric acid which then falls to the earth in either wet (rain‚ snow‚ sleet
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i do assert an opposite argument that one’s success is based on many factors including hardwork‚luck‚happiness‚attitude and certain level of skills. Hard work has a significant role in winning life. It is considered to be one of the prominent elements contributing to determine one’s future. Today success is measured on the basis of money and fame. For instance‚if we work hard‚we can learn alot of money or become famous.Thus people assume that only money can make them wealthy or success in life
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Arrays An array is a series of elements of the same type placed in contiguous memory locations that can be individually referenced by adding an index to a unique identifier. That means that‚ for example‚ we can store 5 values of type int in an array without having to declare 5 different variables‚ each one with a different identifier. Instead of that‚ using an array we can store 5 different values of the same type‚ int for example‚ with a unique identifier. For example‚ an array to contain
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CORE COURSES CHECKPOINT: Grade | NOT ACCEPATABLE0 | ACCEPATABLE1 | EXCEPTIONAL2 | Element | # | | E-portfolio does not cover the required elements such as; college vision and mission‚ CV‚ etc | E-portfolio covers more than half the required elements such as; college vision and mission‚ CV‚ etc. | E-portfolio covers all the required elements such as; college vision and mission‚ CV‚ etc. | Required elements | 1 | | DOES NOT HAVE AN INTRODUCTION | INTRODUCTION IS BROAD AND DOES NOT provides
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Brandon Mrs. Smith Honors English II 7th 22 September 2013 The Unveiling Veldt While reading the very intriguing and entertaining story “The Veldt‚” written by Ray Bradbury‚ I have found the gothic element occurs frequently throughout the story.The story consists of a family who finds the perfect house to raise their offspring in.The parents try to keep their children from the harmful things in society‚ while they are the ones doing the most emotional damage to them through the lifeless house
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to depict the way that individuals applied Effort. The four Effort factors are Space‚ Time‚ Weight‚ and Flow. Each of these Effort factors has two extremes which are called the Effort elements. The first of these Effort factors is Space. The factor of Space shows how a person ’s movement is focused. The two elements of Space are direct and indirect. When using direct movement your focus is on a single point in space. Some examples of direct movement are trying to put your keys into a door to unlock
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Assessment task 3 oral presentation summary Description of the experiment * Aim: To observe the reactions of sulfuric acid as an oxidising agent and as a dehydrating agent. Equipment: * 20mL of concentrated sulfuric acid * 20mL of 2mol/L sulfuric acid * 2 small pieces of each of copper‚ zinc and iron * Sandpaper * 10 test tubes * Test tube rack * 2g of sugar crystals (sucrose) * 2 wooden ice-cream sticks * 10mL measuring cylinders Steps: A: Sulfuric acid
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1. Compliance Status Following rules and regulations is important for institutions and any type of establishment to maintain organization and most importantly provide safety for those involved. For the organization and safety of everyone involved‚ it is important to comply with particular criteria. Hospitals are one of the many organizations that must comply with regulations to keep patients and staff safe and as well as maintain the quality of care. Ideally‚ a good care system for patients includes
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MYP 10 Tbilisi 2013 Project Title: Acidic rain and air pollution Options: * Use your knowledge in chemistry of hydrogen and provide suggestion how world’s energy crisis can be solved. * Use your knowledge in chemistry of sulfur and nitrogen and provide suggestion how air pollution in your city can be reduce. * Use your knowledge in chemistry of oxygen and provide suggestion how ozone layer depletion can be prevented. Chemists have all solutions! This planning guide
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