Module 2

  1. Diffusion
      moving from high to low concentration.
  2. Specific Heat
    • The amount of energy it takes to raise a gram of substanace one degree of temperature.
    •   water good isulator
    •   Ethyl alcohol
    •   ice better insulator
    •   Metals have a lower specific heat.
  3. Calories
    the amount of energy it takes to raise one gram.
  4. Food calories
    One food calorie is equal to 1000 metric calories. So a teaspoon of sugar (which contains 18 calories)  has 18000 calories, enough energy to raise 1 liter of water 18 degrees.
  5. Metals
    On the left 2/3 of the periodic
  6. Non-metals
    on the far right side of the table.
  7. Nobal gasses
    Atoms that do not combine with other atoms.
  8. Subatomic Particles
    smaller than atoms
  9. Elementry particals
    • electrons
    •   protons
    •   neutrons
  10. Atomic number
      number of protons
  11. Mass number
    sum of protons and neutrons
  12. Atomic mass
      Average mass of naturally-occuring isotopes of an element.
  13. Technetium-99(99Tc)
    • Form of Tc used in medicine.
    • 99 is the mass number (43 protons+56 neutrons=99)
  14. Calcium  47(Ca)
    • 20 protons +27 neutrons =47
    • to study bone
  15. Iodine 131(I)
    • 53 protons +78 neutrons =133
    • to destroy thyroid tissue.
  16. Xenon1 33(Xe)
    • 54 protons +79 neutrons =133
    • for respiratory studies.
  17. Electron shells
    •   You can't touch the inner electron shells(electrons closely associated with the nucleus)
    •   electrons loosely associated with the nucleus are more free to come and go.
    •   thus the outer shell determines the chemical properties of the element.
    •   shells like to be full as in the noble gases.
  18. Image Upload 1
    • atoms will give up or take away electrons to achieve a full state.
    • the outer shell electrons are critical for the information of the chemical bonds.
  19. IsotopesImage Upload 2
    • The number of protons determines the atomic number.
    • The number of neutrons can vary.
    • For example, hydrogen-1 and hydrogen-2(deuterium) exsist in nature.
    • Hydrogen-3(tritium) is man-made.
    • These are called isotopes of hydrogen.
  20. Radioisotopes
    • Unstable isotopes that fall apart.
    • nucleus falling apart is called nuclear fission.
Card Set
Module 2
Important vocab.