radioactive elements‚ these are unstable and they break down into more stable atoms over time‚ which is called radioactive decay. Scientists can tell how old a rock is by using radiometric clocks‚ or by looking at its absolute age. Geologists measure the amount of certain radioactive elements; as time passes the radioactive elements change at regular rates‚ into non-radioactive elements. The older a rock is the larger the number of elements. The age of the rock is found by measuring when the element decays
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The element‚ magnesium is unlike most because of the way it is composed‚ and many do not know what Magnesium is. The element has unique physical properties‚ a rich history that stretches back to the 17th century‚ and lots of sophisticated uses that are used in your everyday life‚ and vital to your health as a human. Magnesium’s properties are‚ in a way‚ very unique. On the periodic table Magnesium is found in the Alkaline Earth metal group. The structure of the atom consists of twelve protons‚
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Cavite Philippines ABSTRACT Chemical periodicity was demonstrated using different samples of elements from Group IA‚ IIA and IVA. These samples are: Li2CO3‚ Na2CO3‚ K2CO3‚ MgCO3‚ CaCO3‚ BaCO3‚ Carbon‚ Tin‚ Silicon and Lead. Each sample was placed in a test tube‚ (one sample and one test tube) and the physical color‚ appearance and state was defined. Water was used to test the solubility of the element. We use blue and red litmus paper to test the Metal Oxides in Group IIA. A balanced Chemical equation
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Assignment Chapter 2 Concept Explorations 2.25. Average Atomic Mass Part 1: Consider the four identical spheres below‚ each with a mass of 4.00 g. a. Calculate the average mass of a sphere in this sample. (4.00 + 4.00 + 4.00 + 4.00)/4= 16.00/4= 4.00g Part 2: Now consider a sample that consists of four spheres‚ each with a different mass: blue mass is 4.00 g‚ red mass is 3.75 g‚ green mass is 3.00 g‚ and yellow mass is 1.25 g. * a. Calculate the average mass of a sphere in this sample
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like to use this article or parts of this article in any form‚ then please contact us and we will be happy to work with you to accomplish your goal. We are also available for interviews regarding the Seven Elements of High Performance™ model. We are happy to discuss the inclusion of the Seven Elements of High Performance™ as part of a training program. Please contact us using the information at the end of this article explaining how you would like to use the model in your training program and we will
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Substitute lab for Unit 6 lesson 3: Stoichiometry: Counting by Measuring Mass Purpose Determine the mass of several samples of chemical elements and compounds and use the data to count atoms. Procedure Start Virtual ChemLab and select Counting by Measuring Mass from the list of assignments. The lab will open in the Calorimetry laboratory. Part 1‚ Measuring Metal 1. Click on the Stockroom. Click on the Metals sample cabinet. Open the top drawer by clicking on it. When you open the drawer‚ a
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Sport Confidence According to Bandura and Vealey Aaron Creed Kinesiology 339I 2/21/2011 Sport Confidence According to Bandura and Vealey In any sport‚ an athlete’s performance and success can be directly linked to two major aspects‚ his physical aptitude‚ and his mental readiness. It is common knowledge that athletics involve physical ability and those with the most physical gifts tend to outperform those without them. But look a little deeper and you find that behind the brawn and power
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Molecular Structure a. Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. The Periodic Table organizes elements by their atomic number - from hydrogen (1) to whatever is the highest one currently known (>105). It is arranged so that similiar members fall in a list such as Chlorine Bromine etc.. The average atomic weight is usually shown with each element‚ but due to isotopes (caused buy nuclear varations) the weight is the
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Neutrons 55.85 – 26 = Neutrons Neutrons = 29.85 f) 39.95 = 18 + Neutrons 39.95 – 18 = Neutrons Neutrons = 21.95 QUESTION 2 Using the abbreviated quantum number notation (s‚p‚d‚f) write the electronic configuration of the following elements. a) Silicon b) Germanium c) Silver d) Sodium e) Calcium f) Molybdenum Answer:- a) Full configuration: 1s2 2s2 2p6 3s2 3p2 Noble Gas form: Ne 3s2 3p2 b) Full configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2 Noble
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Ionic Bonds Essay The periodic table is a masterpiece of organized chemical information. It is a table of the chemical elements in which the elements are arranged by order of atomic number. The standard form of the table includes periods (horizontal rows in the periodic table) and groups (vertical rows in the periodic table). Atoms are the basic building blocks of ordinary matter. Atoms are made up of particles called protons‚ electrons‚ and neutrons. Protons carry a positive electrical charge‚
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