Chemistry glossary terms chapter 5 Que cards

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Chemistry glossary terms chapter 5 Que cards
2013-11-28 16:20:01
Chemistry glossary terms chapter Que cards

Chemistry glossary terms chapter 5 que cards
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  1. atom
    the smallest particle of an element that retains the identity of the element

  2. electron
    a negatively charged particle within an atom

  3. subatomic paritcle
    a particle that is smaller than an atom

  4. nucleus
    in chemistry, the positively charged center of an atom

  5. proton
    a positively charged particle that is part of every atomic nucleus

  6. neutron
    an uncharged particle that is part of almost every atomic nucleus

  7. energy levels
    a possible level of energy an electron can have in an atom

  8. atomic number
    the number of protons in  the nucleus of an atom

  9. mass number
    the sum of the number of protons and the number of neutrons in the nucleus of an atom

  10. isotope
    one of two or forms of an element that have the same number of protons but a different number of neutrons

  11. Bohr-Rutherford diagram
    a model of the atom in which a central positive nucleus is surrounded by electrons in energy levels

  12. atomic mass
    the average mass of the naturally occurring isotopes of an element

  13. periodic table
    a system for organizing the elements into columns and rows, so that elements with similar properties are in the same column

  14. metal
    typically, and element that is hard, shiny, malleable, and ductile, and is a good conductor of heat and electricity

  15. non-metal
    typically, an element that is not shiny, malleable, or ductile, and is a poor conductor of heat and electricity

  16. metalloids
    an element that shares some properties with metals and some properties with non-metals

  17. period
    a horizontal row of elements in the periodic table

  18. group
    a vertical column of elements in the periodic table

  19. alkali metals
    Any of the elements lithium, sodium, potassium, rubidium, caesium, and francium. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides

  20. alkaline earth metal
    Any of the elements beryllium, magnesium, calcium, strontium, barium, and radium. They are reactive, electropositive, divalent metals, and form basic oxides which react with water to form comparatively insoluble hydroxides

  21. halogens
    Any of the elements fluorine, chlorine, bromine, iodine, and astatine. They are reactive non-metallic elements which form strongly acidic compounds with hydrogen from which simple salts can be made.

  22. noble gases
    any of the gaseous elements helium, neon, argon, krypton, xenon, and radon. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.

  23. valence electron
    an electron in the outermost occupied energy level of an atom