the selections anven below each item. Write the LETTER of you
blank. Strictly no alteration.
1. Which of the following is true of our understanding of the nature of the atom?
A. It has undergone little, but significant changeand is now complete.
It has undergone change and will likely continue to do so.
C. It is just as the ancients o iginally described it
DE It has undergone such major changes its returning to the ancient model.
2. The two main parts of an atom are its:
A nucleus and electron energy levels
c oxidation number and valence
& nucleons and protons
D. protons and neutrons
3. The electron doud model of the atom is used to do which the following?
A. Provide shade on an otherwise sunny day
1. Describe exactly where electrons are around the nucleus
C Describe possible locations of electrons around the nucleus
D. Predict the location of atom
4. The Bohr Model of the atom says that electrons:
Nove at a very high velocity around the nudeus
B. Electrons exist at different energy levels in a bit around the nudeus
Electrons can move between energy levels when they gain or lose energy
D. All of the above are true about the Bohr model​