The element symbol for Germanium is Ge. It is located in row 4 column 4 on the periodic table and is in block p. It belongs in group 14. Germanium was first proposed by Dmitri Mendeleyev in 1871 based on the gaps found in the newly made periodic table. Germanium was first discovered by the German chemist Clemens Winkler ( Winkler ). Clemens Winkler was born in Freiburg‚ Germany in 1838 but he grew up Zschopenthal‚ Germany. His father Kurt Winkler was a well known chemist and metallurgist. Clemens
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The first tag in a pair is the start tag‚ the second tag is the end tag The end tag is written like the start tag‚ with a slash before the tag name Start and end tags are also called opening tags and closing tags content HTML Elements In HTML‚ most elements are written with a start tag (e.g. ) and an end tag (e.g. )‚ with the content in between: This is a paragraph. Web Browsers The purpose of a web browser (such as Google Chrome‚ Internet Explorer‚ Firefox‚ Safari) is to read HTML documents
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Oxidation Number When elements combine to produce a compound‚ each element is assigned an “apparent” charge. This apparent charge‚ the charge an atom would have if both electrons in each bond were assigned to the more electronegative element‚ may be positive or negative. It is called the oxidation number or state of the element in the compound. Oxidation numbers are very useful in keeping track of what happens to electrons when various elements combine to form compounds. By remembering a few
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JOHN DALTON Five main points of Dalton’s atomic theory 1. Elements are made of extremely small particles called atoms. 2. Atoms of a given element are identical in size‚ mass‚ and other properties; atoms of different elements differ in size‚ mass‚ and other properties. 3. Atoms cannot be subdivided‚ created‚ or destroyed. 4. Atoms of different elements combine in simple whole-number ratios to form chemical compounds. 5. In chemical reactions‚ atoms are combined‚ separated‚ or
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arrange the elements and created the first periodic table. Late 1890s‚ Joseph John Thompson • Discovered electrons using cathode ray test tube experiments • “Plum pudding” model of atoms (1900)– negative electrons in a positive framework 1800‚ John Dalton‚ English chemist: • Proposed the atomic patterns‚ which account for the law of conservation of mass and the law of constant composition • All matter is made of atoms; atoms of an element are identical;
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Mendeleev is best known as the chemist who created the periodic table of elements. He arranged the 63 elements known at the time into a Periodic Table based on atomic mass. This was then published in Principles of Chemistry in 1869. His first Periodic Table was put together by arranging the elements in ascending order of atomic weight and grouping them by the similarity of properties. He even predicted that other elements existed‚ and left space open for them. Mendeleev also provided for variance
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TOPIC ELEMENT 1 Accident Reason for preventing Accident IGC1 Element 1 2 Accident Data IGC1 Element 7 3 Accident Information IGC1 Element 8 4 Accident Investigate IGC1 Element 8 5 Audit Advantages and Disadvantages IGC1 Element 7 6 Audit Findings IGC1 Element 7 7 Cause Immediate and Root (underlying) IGC1 Element 8 8 Committee Benefits IGC1 Element 3 9 Communication Barriers IGC1 Element 4
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The name of the chemical element is Technetium. Tc is the symbol of Technetium in chemistry. (Also it is the symbol of the republic of Turkey which is the country that the most awesome man‚ Karl Machin‚ lives in.) Technetium has 43 protons so its atomic number is 43. It has 55 neutrons. The sum of 55 and 43 is 98 because of that 98 is the mass number of Technetium. It is in the d-block and it is a transition metal. Technetium is in the 7th group in the periodic table because it has 1 electron on
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|WEEK |LEARNING OBJECTIVES |LEARNING OUTCOMES |ACTIVITIES |REMARKS | |1 |FORM 4 ORIENTATION | | |4/1 – 6/1 |
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The Periodic Table By Eric Scerri 1. I just returned home from being interviewed for a new public television program on the mystery of matter and the search for the elements. It was very gratifying to see how keen the film-makers were on understanding precisely how Mendeleev arrived at his famous first periodic table of 1869. This in turn meant that I had to thoroughly review the literature on this particular historical episode‚ which will form the basis of this blog. 2. The usual version of how
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