1. Which one of the transitions below would emit the shortest wavelength of light?

2. Which one of the following types of radiation has the shortest wavelength, the greatest energy, and the highest frequency?
a) ultraviolet radiation
b) visible red light
c) visible blue light
d) none because short wavelength is associated with low energy and low frequency, not high energy and high frequency

3. True or False??
An excited atom can return to its ground state by absorbing electromagnetic radiation.
False

4. True or False??
The energy of an atom is increased when electromagnetic radiation is emitted from it.
False

5. True or False??
The energy of electromagnetic radiation increases as its frequency increases.
True

6. True or False??
An electron in the 4th energy level can go to the 2nd energy level by emitting electromagnetic radiation at the appropriate frequency.
True

7. Use the following words to complete the essay discussing the differences in color between Sodium and Copper as seen in the Flame Lab. A word may be used more than once.
high, low, highest, lowest, long, short, longer, shorter, ground state, excited state, absorb, emit, Aufbau, Heisenberg, Hund's, Paulie, photon of light, electron

8. When energy is added to an atom, electrons can ______________ energy and jump to a _______________ energy level. When this occurs, we say that the atom is in its ______________. This leaves a "hole" at the _____________ energy level. Because the _______________ Principle says that electrons must fill the ______________ energy level possible, electrons ______________ a specific wavelength of light as they return to __________________. The more energy the electron gives off, the _____________ the wavelength. A purple color shows _____________ energy, ____________ frequency and _______________wavelength, while a red color shows _____________ energy, ____________ frequency and _______________wavelength.
high
absorbs
Excited state
low
Aufbau
lowest
emit
Ground state
shorter
HIGH
HIGH
short
low
low
L O N G

9. Mass/Mole conversion Review
Find the Molar Mass of the following
Ca(NO2)2
132g
Mg(OH)2
58g
Fe(NO3)3
242g
Sn (SO4)2
311g

10. Moles to Grams If you have 2.5 moles of Fe, How many grams is this
139.6 grams Fe
If you have 9.6 Mol Ca(NO2)2, how many grams?
1267.2g

11. Grams to Moles .If you have 20 grams of Mg, how many moles is this?
0.82 mole Mg
If you have 45 g of Mg(OH)2 how many moles?
.7756 mol Mg(OH)2

12. Moles to Atoms/Molecules
How many atoms in 2.50 Mol Na
1.5 x10 24 atoms Na
How many molecules in mol Na2S
7.71x1022 Molecules Na2S

13. Grams to Molecules/Atoms
Atoms in 50.0 g Zn
4.6x1023 atoms
Molecules in 60g K2SO4 (174 g/mol)
2.1x1023 molecules

14. Bohr Model
Write the Bohr Model for Cr