Chemistry Midterm

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Chemistry Midterm
2013-01-14 21:39:43

Chemistry flashcards.
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  1. Law of Conservation of Mass
    A scientific law that states that mass is neither destroyed nor created during ordinary chemical reactions or physical changes
  2. Law of definite Proportions
    the fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound
  3. Law of Multiple Proportions
    If two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers.
  4. Isotopes
    atoms of the same element that have different masses.
  5. Aufbau principle
     an electron occupies the lowest-energy orbital that can receive it
  6. Pauli exclusion principle
    no two electrons in the same atom can have the same set of four quantum numbers.
  7. Hund’s rule
    orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and all electrons in singly occupied orbitals must have the same spin.
  8. To find the energy of the Photon
  9. What does H equal?
    Planck's constant, 6.626*10-34
  10. The speed of light
    3.0*108, C
  11. The equation for wavelength/frequency
    c= LANDA V