Editing revision 1 of Answer To 2018-2019 Review HW For Quantum Mechanics And Electron Configuration

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1. Classical - High mass and low speed 
Quantum mechanic- speed of light and no mass 
 
2. region of space that electrons can not reside in, 3 
 
3. Planck, frequency 
 
4. We know the EXACT speed of an electron but can only find the highest probability of finding an electron (can't ever know exact location) 
 
5. Bohr's equation (where energy of an electron is directly proportional to the distance electron is from the nucleus). Schrodinger solutions are the region of space in charge cloud where an electron with a specific energy is located (we call them orbitals) 
 
6. With degenerate orbitals, you fill one electron in each degenerate orbital before you put an electrons in an already occupied orbital (i.e. before you double up) 
 
7. 8 electrons (4 orbitals with a max of 2e- per orbital) 
 
8. 16 orbitals 
 
9. 18 e- (each block on Period Table is another electron and there are 18 blocks in 4th row of Periodic Table. 
 
10. No because f subenergy level is the 4th one and 3rd energy level can only have 3 subenergy levels (s,p,d) 
 
11. Isotope is atoms of an element that have different mass (mass difference is by # of neutrons). 126 C. or Carbon-12 or C-12 
 
12. #n = A - Z or #n = mass number - atomic number 
 
13. Atomic Number 
 
14. Valence electrons are electrons in the highest energy level (n or principle quantum number). Number of valence electrons can be found on the Periodic Table by counting number of column from left to right on Periodic Table excluding d and f blocks. 
 
15. Atomic mass is the weighted (by number of isotopes) average of the mass of all the isotope of an element. 
 
 
Electron Configuration 
 
1. As 1s2 2s22p63s23p64s23d104px14py14pz1 
5 valence electrons 
 
2. Ag 1s2 2s22p63s23p64s23d104p65s14d24d24d24d24d2 
 
NA 
 
3. Bi 1s2 2s22p63s23p64s23d104p65s24d105p66s24f145d106px16py16pz1 
5 valence electrons 
 
Give the number of protons (#p), neutrons (#n), and electrons (#e) for the following isotopes 
4a. 20, 22, 20 
4b. 6, 7, 6 
4c. 92, 146, 92 
 
Atomic Mass calculation 
 
You need to use the information in the Atomic Mass Information Table and use the table indicated in the class notes for Calculating Atomic Masses. An example of how the table is going to look is on this webpage, [http://www.tmcleod.org/Level1/0809twotableforatomicmasscaltable.doc Two Calculating Atomic Mass Table].

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