The gold foil that Rutherford used in his scattering experiment had a thickness of approximately 0.005 mm. If a single gold atom has a diameter of 2.9 X 10 $^{-10}$ m, how many atoms thick was Rutherford’s foil?

The “lead” in lead pencils is actually almost pure carbon, and the mass of a period mark made by a lead pencil is about 0.0001 g. How many carbon atoms are in the period?

Rutherford's experiment with alpha particle scattering by gold foil established that?

The results from Thomson's cathode-ray tube experiment led to the discovery of which subatomic particle?

The results from Thomson’s cathode-ray tube experiment led to the discovery of which subatomic particle?

Describe Rutherford's experiment and how it led to the structure of the atom. How was he able to estimate the number of protons in a nucleus from the scattering of the particles?

What discovery about atomic structure was made from the results of Rutherford’s gold foil experiment?

The $\mathrm{x}$-ray spectrometer on board a satellite measures the wavelength at the maximum intensity emitted by a particular star to be $\lambda_m=82.8 \mathrm{~nm}$. Assuming that the star radiates like a blackbody, (a) compute the star's surface temperature. (b) What is the ratio of the intensity radiated at $\lambda=70 \mathrm{~nm}$ and at $\lambda=100 \mathrm{~nm}$ to that radiated at $\lambda_{\mathrm{m}}$ ?

Ammonia $\left(\mathrm{NH}_3\right)$ and hydrazine $\left(\mathrm{N}_2 \mathrm{H}_4\right)$ are both compounds of nitrogen and hydrogen. Based on the law of multiple proportions, how many grams of hydrogen would you expect $2.34 \mathrm{~g}$ of nitrogen to combine with to yield ammonia? To yield hydrazine?

Ammonia (NH$_3$) and hydrazine (N$_2$H$_4$) are both compounds of nitrogen and hydrogen. Based on the law of multiple proportions, how many grams of hydrogen would you expect 2.34 g of nitrogen to combine with to yield ammonia? To yield hydrazine?

If the chemical formula of compound A in previous question is SO$_{2}$, what is the chemical formula of compound B?

Compounds A and B are colorless gases obtained by combining sulfur with oxygen. Compound A results from combining 6.00 g of sulfur with 5.99 g of oxygen, and compound B results from combining 8.60 g of sulfur with 12.88 g of oxygen. Show that the mass ratios in the two compounds are simple multiples of each other.

Compounds A and B are colorless gases obtained by combining sulfur with oxygen. Compound A results from combining $6.00 \mathrm{~g}$ of sulfur with $5.99 \mathrm{~g}$ of oxygen, and compound $\mathrm{B}$ results from combining $8.60 \mathrm{~g}$ of sulfur with $12.88 \mathrm{~g}$ of oxygen. Show that the mass ratios in the two compounds are simple multiples of each other.

Learning goal is to analyze the experiment used to determine the properties of an electron. In 1909, Robert Milikan performed an experiment involving tiny, charged drops of oil. The drops were charged because they had picked up extra electrons. Millikan was able to measure the charge on each drop in coulombs. Here is an example of what his data may have looked like:

In Milikan's experiment, the charge on each drop of oil was measured in coulombs. Imagine the same experiment, but with charges measured in a fictitious unit called a zeet (Z).

What is the charge on an electron in zeets?