Matter & Properties
Nuclear Chemistry
Atomic/Electron Structure/EMR
Stoichiometry/Factor Label
100
Solve the following equation, using correct units and sig figs (calculator allowed):
24.3 g/L * 3.020 L = ?
73.4 g
(3 sig figs, g/L*L cancels out to just g)
100
How many protons, neutrons, and electrons are in 2914Si+4 ?
Protons: 14
Neutrons: 15
Electrons: 10
100
What was the main aspect of the Thomson atomic model that Rutherford model improved upon?
The Rutherford model has the positive charge localized in the center of the atom (the nucleus). Thomson's model (the plum pudding model) had the positive charge evenly distributed throughout the whole atom.
(Points given on Dace's discretion)
100
How many cm are in 2.3km?
2.3x105cm (2.3km*1000m/1km*100cm/1m)
200
Which one(s) of the following are chemical changes:
Burning your toast Making Kool-aid with powder
A snowman melting Soda going flat over time
Burning your toast is the only chemical change
200
Complete the following nuclear equation:
22387Fr --> __ + 42He
22387Fr --> 21985At + 42He
200
Br-1 what what ending electron configuration?
4p6
200
How many times could you watch the FNAF movie in 2.00 weeks with no sleep or breaks in between? (FNAF is 110 minutes long)
183 times (2 weeks*7days/1week*24hrs/1day*60min/1hr*1FNAF/110min)
300
Based on the above solubility curve, 30g of potassium nitrate can be dissolved in water at or above what temperature?
20o C
300
Complete the following nuclear equation:
___ + 126C --> 24698Cf + 410n
23892U + 126C --> 24698Cf + 410n
300
Write the full electron configuration for Bismuth, plus the shortened notation.
Full: 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p3
Shortened: [Xe]6s24f145d106p3
300
How many atoms of gold are in 10.1g of gold?
3.09x1022 atoms (10.1g*1mol/196.97g*6.022x10^23atoms/1mol)
400
Which of the following are NOT characteristic properties? (select all that apply)
Viscosity Temperature
Mass Reactivity
Mass & Temperature are not characteristic properties
400
You have 8g of Cf-252. 15.9 years ago you had 512g. What is Cf-252's half-life?
2.56 Years (512 -> 8 is 6 half lives, 15.9/6=2.56yrs)
400
A beam of light has 4.79x10-19J of energy. What is its frequency, wavelength, and color?
4.79x10-19J / 6.63x10-34Js= 7.22x1014 s-1 (frequency)
3.00x108m/s / 7.22x1014s-1 = 4.15x10-7m (wavelength)
415nm corresponds to a violet (purple) color
400
How many g of H2SO4 are required to be added to 20.mL of water to make a 0.45M solution?
.020L*0.45mol/1L=0.009mols required
0.009mol*98.08g/1mol= 0.88g Sulfuric acid
500
Draw an accurate, labeled graph of temperature vs time for gallium melting (Gallium's freezing point is 29.76oC)
Dace will award points & draw example
500
What is the final daughter nucleus if Plutonium-239 undergoes alpha decay twice, then beta decay once?
23994Pu --> 42He + 23592U
23592U --> 42He + 23190Th
23190Th --> 0-1e + 23191Pa
500
Why are the spectrum lines for a given element only specific colors? (use the terms energy level, fluorescence, quantized, & wavelength in your answer)
Points given by Dace's discretion.
500
In the reaction between potassium & water, how many g of potassium are required to make 30.0g of hydrogen gas?
Equation: 2K + 2H2O --> 2KOH + H2
3.00gK*1molK/39.1g*1moH2/2molK*2.02gH2/1molH2=0.775g K