USE of METALS 2. CHEMICAL ACTIVITY of the METALS 3. PATTERNS of the PERIODIC TABLE 4. QUANTITY CALCULATIONS... the MOLE 5. METALS from their ORES ...all in the context of how Chemistry contributes to cultural development but first‚ an introduction... Chemistry of the Metals Technology Needs Metals In the previous topic you learnt about the Elements of the Periodic Table. In this topic you will concentrate on the chemistry of the metals‚ and some of the chemical patterns that they
Free Periodic table Chemical element Atom
between atoms. It is a type of chemical bond that generates two oppositely charged ions (Larsen‚ 2010). Element that have a positive ion are able to bond with elements with negative ions. This is because the elements share the electrons so that the ionization becomes neutral and both atoms become stable. Materials: 1. Cards with elements and positive or negative ions. 2. Reference Tables for Physical Setting/CHEMISTRY 2011 Edition: Periodic Table of the Elements 3. Bond With a Classmate Worksheet
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Radioactive Isotopes Radioactive isotopes are any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha‚ beta‚ and gamma rays. Every chemical element has one or more radioactive isotopes. More than 1‚000 radioactive isotopes of the various elements are known.. Approximately 50 of the isotopes are found in nature; the rest are produced artificially as the direct products
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Common Elements/Uses Element Common Uses &/or Descriptions Aluminum A light metal used in making airplanes‚ buildings‚ pots and pans‚ etc. Bromine Used in photography‚ medicines‚ insecticides‚ etc. Calcium A soft‚ metallic chemical element found in limestone‚ marble‚ chalk‚ etc. Carbon Found in coal‚ oil‚ gas‚ living things‚ and inks. Chlorine Used in bleach‚ in chemical to kill germs in swimming pools‚ and found with the element sodium in table salt. Chromium A shiny metal usde on bumpers
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of density in Group 4A elements. Background: When the elements are arranged in order of increasing atomic number‚ they exhibit periodic recurrence of properties. Elements in the same group in the periodic table tend to have similar physical and chemical properties. These similarities are due‚ in large part‚ to similarities among the electron configurations of the elements in a group. You can find periodic trends in certain properties‚ such as density‚ among the elements within a given group. In
Free Periodic table Chemical element Germanium
29) The structural formulas are given for these cis or trans alkenes. (a) trans-1‚2-dichloropropane (b) cis-2-pentene (c) cis-3-hexene (d) trans-2-hexene Write the structural formula for: (a) cis-1‚2-dichloropropene (b) trans-2-pentene (c) trans-3-hexene (d) cis-2-hexene 30) In each case‚ tell whether cis and trans exist. If they do‚ write the structural formulas for two isomers and label each cis or trans‚ (a) Br2CH2 : No (b) CH3CH2CH=CHCH2CH3: Yes (c) CH3CH=CHCH3:
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the planet Superman is from‚ but it is actually a chemical element. Krypton is one of the rarest gases on Earth which makes it very expensive. It can also be found in Mars’s atmosphere‚ but only makes up 0.3 parts of a million. Krypton was discovered in 1898 by Morris Travers and Sir William Ramsey. It was named after the Greek word‚ kryptos‚ which means “hidden”. The basic facts: Noble gases carry the trait of not reacting with many elements and Krypton is classified in this group. It is located
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Sodium‚ one of many elements in the periodic table is being used in everyday life‚ it is also an essential element within your body. It is just another element‚ but one of the differences is that this element is something that most people consume every day. Sodium has played an important role in everyday life because of its uses in medicine‚ industry‚ and agriculture(Shriver). Sodium was discovered in 1807 by a man named Sir Humphrey Davy. He was well known for his discoveries of most alkali metals
Free Periodic table Chemical element Sodium
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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Lanthanide family. Neodymium is a chemical element with the symbol Nd‚ the atomic number 60‚ and a soft‚ bright‚ silvery white metal. It was first identified in 1885‚ in Vienna‚ by Austrian scientist Carl Auer von Welsbach. Neodymium was discovered in ‘didymium’ a substance incorrectly identified by Carl Mosander in 1841. In 1869‚ ‘didymium’ had the symbol Di in Mendeleev’s first periodic table in 1869. Many people‚ such as Bohuslav Brauner‚ tried to identify the element
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