Chemical Element and Elements Essay

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Who Is The Father of the Periodic Table?
There has been some disagreement about who deserves credit for being the "father" of the periodic table, the German Lothar Meyer (pictured here) or the Russian Dmitri Mendeleev. Both chemists produced remarkably similar results at the same time working independently of one another. Meyer's 1864 textbook included a rather abbreviated version of a periodic table used to classify the elements. This consisted of about half of the known elements listed in order of their atomic weight and demonstrated periodic valence chages as a function of atomic weight. In 1868, Meyer constructed an extended table which he gave to a colleague for evaluation. Unfortunately for Meyer, Mendeleev's table became available to the scientific community via publication (1869) before Meyer's appeared (1870).

First Attempts At Designing a Periodic Table

If a periodic table is regarded as an ordering of the chemical elements demonstrating the periodicity of chemical and physical properties, credit for the first periodic table (published in 1862) probably should be given to a French geologist, A.E.Beguyer de Chancourtois. De Chancourtois transcribed a list of the elements positioned on a cylinder in terms of increasing atomic weight. When the cylinder was constructed so that 16 mass units could be written on the cylinder per turn, closely related elements were lined up vertically. This led de Chancourtois to propose that "the properties of the elements are the properties of numbers." De Chancourtois was first to recognize that elemental properties reoccur every seven elements, and

Abundance of the Chemical Elements and Neat Freak Robot Essay

I’m building, it good for it to be made out of steel so it won’t break easily. Steel is one of the most common constructing materials there is. Iron is also a type of steel which pretty much does the same as steel. Iron is a relatively abundant element in the universe. It’s a great source to use especially because the robots are usually made out of steel and iron. My robot would be powered by batteries. I chose this because it’s the easiest to use and makes it reusable. All you have to do…

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Living Organisms Use Elements As The Medium For The Chemical Reactions Necessary To Maintain Life

January 30, 2014 Chapter 2 Review Questions 1. Living organisms use Elements as the medium for the chemical reactions necessary to sustain life. 2. What are the three subatomic particles and their charges? Protons-Positive, Neutrons-Neutral, Electrons-Negative 3. What is a compound? A compound is a substance that contains two or more elements in a fixed ratio. 4. What ion is commonly associated with acidic pH? Citrus 5. Which subatomic particle is involved in the interaction of two atoms…

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Mr. Cole Harder Essay

matter chemists classify matter in two different states chemical and physical. matter: anything that has mass and occupies space. matter can be organized into pure substances and mixtures. pure substance: cannot be broken down into simpler substances.grouped into elements or compounds. element: substances composed of only one kind of atom. ie. hydrogen, oxygen, and gold. compound: substances composed of two or more elements chemically combined. i.e. water, and sugar. mixture: can…

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P1 Unit 3 Assignment

Manufacture of Compounds from Group 1 an 7 elements In this assessment you will have opportunities to provide evidence against the following criteria. Criteria reference To achieve the criteria the evidence must show that the student is able to: Task no. Evidence Achieved? P1 Describe the physical and chemical properties of group 1 and 7 elements. 1 tables Yes/partial/no M1 Describe trends in the physical and chemical properties of group 1 and 7 elements. 1 Written document Yes/partial/no…

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Research Paper On Atoms

draw atoms as circles: Elements There are over a hundred different types of atom, and these are calledelements. Each element has a special name. For example carbon, oxygen and hydrogen are all elements. Lead and gold are elements too. A piece of pure gold contains only gold atoms. A piece of pure lead contains only lead atoms. Chemical reactions join or split atoms to rearrange them. But they cannot change one element into another element, or anything simpler. A chemical reaction cannot turn lead…

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Types Of Elements

Elements & Atoms An element is made up of same type of atoms which are chemical bonded; everything on earth is made up of atoms. Elements cannot be split into anything simpler by any chemical methods because an element only contains one type of atom. Periodic table There are about 100 different type’s elements on the periodic table, each element on the periodic table has their own symbol. The first letter of the elements symbol has to be start with a capital letter on the periodic table. Elements…

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Term Papaer Essay examples

Solubility easily to dissolve Luster reflect to light Chemical properties characteristics that describe how a substance interacts or fails to interact with other substances to produce new substances Physical change change in which the physical appearance or phase of matter without changing the fundamental structure or chemical make-up Chemical change change resulting in a new substance with different properties Chemical composition Keep properties Phase change (8) Altering the INTERmolecular…

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Chemistry Notes Essay

Chemistry The Elements and Periodic Table 79 Au 197.0 Gold 79 Au 197.0 Gold The Atom * Contains protons and neutrons in the nucleus Atomic # * Electrons outside the nucleus in shells * Mass # = Protons + Neutrons Symbol * Atomic # = Electrons = Protons Atomic Weight * Mass # - Atomic # = Neutrons Name The Periodic Table * Columns are called groups. There are 8 groups * Elements in the same group have the same properties * Rows are called…

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Block: Periodic Table and Main Group Elements Essay examples

Blocks A block of the periodic table of elements is a set of adjacent groups. The respective highest-energy electrons in each element in a block belong to the same atomic orbital type. Each block is named after its characteristic orbital: s, p, d, f, g (no elements belonging to the g-block have been observed). The four blocks are s, p, d, and f. Elements in each block are colour coded in the background graphics, the periodic tables, and the element pages themselves. To see these colours, however…

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Biology Chap 2 Essay

Biology- Chapter 2 Book Notes 2.1 Matter Consists of Chemical Elements in pure form and in combinations called compounds Elements & Compounds An element is a substance that cannot be broken down to other substances by chemical reaction Ex. Na- Sodium A compound is a substance consisting of 2 or more different elements combined in a fixed ratio Ex. NaCl- Sodium Chloride The elements of life About 20%-25% of the 118 elements are essential elements that an organism needs to have to live a healthy life…

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