first chapter 30, then quiz, then 31, then errors (hopefully?)

problems, are conceptual, not too many formulas

• calculations are also weird, considering youh have to keep alot of decimal places

…

going through each question

1. important question

   • atomic masses in table for most element is not close to whole number
     • average of isotopes

2. dasdasdasd

   1. people were really thinking before this could be osmething chemicals
      1. the radiations\particles (we didnt know what they were)
      2. they thought radiation was a chemical reaction
         1. they werent even sure what chemistry this is
         2. but quantum mecahnics established it
            1. quantum mechanics is anything involved with electrons
            2. if you have a chemical reaction to form ….
               1. all of these chemical reactions involve electrons
   2. they did alot of experiements to find which chemical eexperiment:
      1. the energy of this particle was very high (electron is 1 to 10 eV; small in J)
      2. the particles that come out of are in MeV (no way it is from electrons)
         1. exposing uranium to a verys trong acid changes it, but the radiation is still there ?
            1. this occurs because it’s from the inside of a nucleus, not from the chemical bonds

3. fill em up:

   1. the anti-neutrino hints for beta,
      1. 20 → 21
   2. gamma, has no protons or neutrons, therefore, number of Z and A is the same
   3. loss of 1 proton → positron and neutrino
   4. alpha decay

problems

1. density of nuclear matter → we have to take the mass of a nucleus, and divide it by its volume