Chemistry chapter 5

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Author:
andrew_johnstone
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249192
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Chemistry chapter 5
Updated:
2013-11-26 11:51:38
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chemistry chapter
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Description:
glossary terms for chapter 5
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  1. atom
    • the smallest complete unit of matter
    • made of protons, electrons and neutrons
    • different element=different atom
  2. electron
    • negative particle in atom
    • arranged in energy levels
    • their wiggle=electricity
    • atomic mass of 1
  3. subatomic particle
    • particles smaller than atoms
    • electrons, neutrons and protons
    • make up atoms
  4. nucleus
    • the middle of the atom, where the neutrons and protons are
    • holds atom together
  5. proton
    • positively charged particle
    • in the nucleus
    • atomic weight 1836
  6. neutron
    • neutrally charged particle
    • in the nucleus
    • atomic weight 1837
  7. energy levels
    • where electrons are allowed to travel
    • 1st=2, 2nd=8, 3rd=8
  8. atomic number
    • how many protons (and usually electrons) are in an atom
    • dif. number= dif. element
    • eg. hydrogen=1
  9. mass number
    • how many protons AND neutrons are in an atom
    • eg. hydrogen=1 (1 proton, 0 neutron)
  10. isotope
    • an atom with an unusual number of neutrons
    • stated element-mass
    • eg. hydrogen-2
  11. bohr-rutherford diagram
    • the diagram you use to label atoms
  12. atomic mass
    • the actual mass in electrons of an atom
    • 1 p=1836
    • 1 e=1
    • 1 n=1837
  13. periodic table
    • the God table that you use for all necessary information
    • rows=number of energy levels
    • columns=number of valeance electrons
  14. metal
    • something that likes giving electrons
    • eg. aluminum
  15. non-metal
    • something that likes taking electrons
    • eg. chlorine
  16. metalloids
    either metals or non-metals depending on a number of factors
  17. period
    • rows
    • check periodic table
  18. group
    • columns
    • check periodic table
  19. alkali metal
    • super reactive, needs to lose an electron
    • eg. sodium (fizz)
  20. alkaline earth metal
    • group 2- next to alkali
    • somewhat reactive
    • eg. beryllium
  21. halogens
    • group 17-next to noble gases
    • super reactive, needs to gain a electron
    • eg. chlorine
  22. noble gases
    • the perfect atom, super unreactive
    • group 18
    • eg. helium, krypton
  23. valeance electron
    • electrons in the outer perimeter
    • atoms don't like lonely ones
    • eg. H=1, Na=1, Ar=8

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