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Atoms & Bonding

  1. atom
    • smallest particle of element
    • retains properties of the element
  2. nucleus
    • small dense center of an atom
    • contains protons & neutrons
  3. protons
    positively charged
  4. neutrons
    no charge
  5. where is most of the mass of atoms located
    nucleus
  6. electron orbital (electron cloud/ electron shell)
    location of very small negatively charged particles
  7. atomic number
    • number of protons
    • protons=electrons
    • determines type of element
  8. mass number
    sum of protons & neutrons
  9. isotope
    • atoms same number of protons
    • different number electrons
  10. nuclear symbol
    mass number/atomic number atom aymbol
  11. hyphen symbol
    atom symbol-mass number
  12. atomic mass
    average mass of all naturally occuring isotopes
  13. unit of average atomic mass
    • AMU
    • atomic mass unit
  14. average atomic mass=
    (mass)(%)+(mass)(%)/100
Author
ht2lvu
ID
2608
Card Set
Atoms & Bonding
Description
qtr 2 chemistry finals
Updated

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