Page 1 PERIODIC TABLE OF ELEMENTS
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Alkali Metals Non-metals Atomic Number PERIOD Alkaline Earth Metals Halogens Symbol Transition Metals Noble Gases
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A Periodic Table of the Elements at Los Alamos National Laboratory (English, soda; Medieval Latin, sodanum, headache remedy) Long recognized in
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For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses 1 3 4 11 12 19 20 37 38
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The Periodic Table of the Elements 1 H Hydrogen 1 00794 2 He Helium 4 003 3 Li Lithium 6 941 4 Be Beryllium 9 012182 5 B Boron 10 811
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Reactivity is a chemical property that determines how elements will react with others to form compounds ? What makes an element reactive? ? Number of valence
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Relative atomic mass is shown with five significant figures For the precise value of the atomic mass you must click on an element symbol in periodic table
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An ion is a charged atom with more or fewer electrons than protons The atomic weight of an element is the average number of protons plus neutrons You can
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English-Chinese Periodic Table of Elements ??????? © 2005-2017 Dave Lo www davelo net Updated Sep 2017 This work may be copied for use in personal
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