Beanium Isotope Lab Introduction: Isotopes are explained as the variations of the number of neutrons that an element may have. Some isotopes are more common than others. This experiment was performed to help visualize the different isotopes of an element and show how some isotopes will appear more often than others. Purpose: To visualize and understand isotopes Materials: Refer to Lab Sheet “Isotope Experiment- Beanium”
The observed emission data for the different elements did not look how they were supposed to. However the “peaks” for Hydrogen were found to be 534.52 and 631.24, 534.70 and 569.11 for Helium and 529.73 and 630.71 for Mercury. The Rydberg’s Constant found to 1.1x107 8.5x104 while the known constant is 10967758.34m-1. The percent error of 0.29% and the accuracy of this reading is 99.7. The slope and intercept of the linear regression line is -0.01 3.3x10-5 and 0.02x10-1 1.9x10-6 respectfully.
The colorimeter must be set to the correct wavelength setting. In this experiment, the wavelength must be set to blue so it can
One must look to see which element has both violet and orange spectra lines. It is shown that the element Cesium is the only element that has both violet and orange spectra lines. 2. Describe two different approaches to exciting the electrons that exist in elements. Offer a specific reason why scientists use different approaches to excite the electrons of different elements.
She separates her students into two groups to see how they will change and try to react to the group. She separated them into categories of blue and brown eye. Each day she selected a different eye color to be the superior one. They would discriminate against their friend if they were superior. They were just doing what one was doing, or at least following what the teacher told them to do in this experiment.
Elements are described by the mass of their atoms – atoms of different elements have different masses. Dalton used the word weight rather than mass. 4. When elements react, their atoms come together in simple, whole-number ratios. This assumption helps in the explanation of the ‘law of definite proportions’. 5.
The main strength of conducting this experiment is that is shows the behavior exactly as it occurs in the real world.
Harold Urey - Experiment Harold Urey’s discovery of deuterium is perhaps his most revolutionary discovery. Not only did Urey receive a Nobel Prize for his work towards hydrogen-2, deuterium would go on to become invaluable both to chemists’ understanding of the elements, and the field of chemistry as a whole. Urey’s pursuit of deuterium began in 1931, after his interest was piqued by a scientific journal that discussed the supposed existence of the isotope. Using the Balmer series, which is the series of lines in the hydrogen atomic emission spectrum, Urey and a colleague by the name of George Murphy, calculated where hydrogen-2’s emission lines should be located. They determined that the isotope’s emission lines would be “redshifted” (shifted
This lab was quite difficult for me because I had absolutely no idea what I was doing or how I was even getting the answers, but I was able to complete it and I did learn a few things about this lab like how the Doppler Effect is used to discover an extrasolar planet. To begin with an extrasolar planet is any planetary body that is outside the solar system and that usually orbits a star other than the Sun. Direct evidence of extrasolar planets is very difficult to obtain. Astronomers use methods like the Doppler technique which are commonly used more when searching for extrasolar planets.
So as they were developing this experiment they needed to gather
Spectra from different atoms have differing numbers of discrete spectral lines. The thickness of each spectral line also varies by atom. The number of spectra lines tends to increase as the number of electrons increase. Not all atoms emit each color. Spectral lines are considered a “fingerprint” for each atom, therefore each is unique.
Students who earned below 70 percent will be in the experimental group. Below a 70 percent is a lower average grade. This group of students is in the experimental group because they are part of the hypothesis. This group is needed to look at to learn about the male professor’s sections of the chemistry course. The control group is the students that earned 70 percent or higher in the course.
The main idea of this experiment is also often highlighted in the theoretical discussion of the clarification of quantum
However, any doubts regarding the results may be traced to a few elements of the experiment that lend themselves to possible error. The following factors may have contributed to potential errors in the experiment; the need to zero the machine between each of the readings in obtaining the absorption spectrum and the resulting peak wavelength, the precision with which a person can accurately adjust the needle on the spectrophotometer to zero is limited, not putting in the inaccurate amount of cobalt chloride or water into the substance, and getting oil from our fingers onto the
Through the titration process, we are able to identify physical changes to the mixture such as the colour change to indicate the end point of the experiment. For example, the colour changes of phenolphthalein from colourless to pink and methyl orange from red to orange and subsequently yellow. Acids produce hydrogen ions and bases produce hydroxide ions. This causes the indicator to change colour due to the colour difference from the undissociate molecules.
