| Advantages(s) | * Can notice the specimens that are living and lifeless * Inexpensive | Higher resolution and magnification | Disadvantages(s) | Lower resolution and magnification | * Extremely costly * Specimens must be lifeless | 4. Which part of the compound light microscope should be adjusted if? a) The image appears blurry under low power? – coarse adjustment b) The image appears blurry under high power? – fine adjustment c) The image appears too dim?
Activity 10A the atomic radius decreases as you move ACROSS a period in the periodic table because the electronegativity pulls the outer shell electrons in more strongly. but when theres only 1 electron in the outer shell, it is more difficult to pull it in. the positive charge in in the nucleus that attracts the outer shell electrons towards it and so it decreases as you move across the table. BUT as you move DOWN the table, more and more shells and being added which means its getting bigger as
Atomic Emission Line Spectra Introduction: Simply observing the emission from different elements was what the students did in the lab. The purpose of this lab was for the students to use the observations from the diffraction grating and compare the observations to Emission Line Spectrums from different elements and identify them. The transition of electrons from higher to lower electronic energy levels in elements produce emissions of light. Electrons are moved to higher energy levels when energy is supplied tot the element. When the electron returns to a lower level, a photon with that energy difference is emitted.
However, it is expensive to make and is quite large so can be difficult to store. The gradient magnets are 3 smaller magnets within the machine, it is known as the ‘fine tuning’ part of the scanner. These magnets are much smaller than the primary magnets. This part of the machine allows it to concentrate on a certain part of the body. In an MRI machine the gradient magnets create ‘image slices’ of whichever part of the body is being scanned.
The bond between the two oxygen atoms in peroxide is relatively weak; unstable peroxide decomposes producing nitrogen gas and 3-aminophthalate dianion. Electronically exited state of the dianion ultimately releases energy in the form of light by emitting a photon. Light emission resulted from the conversion of chemical energy into light energy due to changes in the composition of the chemiluminescent material. Thus, light production is related to the electronic state of the molecule. If an electron is promoted to an orbital of higher energy, it is no longer paired.
Chromatography Lab Title: Paper Chromotography of Photosynthetic Pigments Lab Purpose: The purpose of this lab is to determine the characteristics Rf of each of the four pigments (Carotene, Xanthophyll, Chlorophyll a, and Chlorophyll b). Materials: see attached lab sheet. Procedure: see attached lab sheet. Research Information: Chlorophylls are greenish pigments which contain a porphyrin ring. This is a stable ring-shaped molecule around which electrons are free to migrate.
Lab Partner: Jason Wallace 02/17/09 LAB ABSTRACT: In this experiment unknown substances were identified by performing different flame tests on known substances. The substances identity was obtained by placing salt solutions of a metallic ion and observing the color of the emitted photon light. INTRODUCTION: By placing atoms of a substance into a flame it can absorb energy and jump into an excited state; called a quantum jump. After absorbing energy and leaping into an excited state, the atoms return back to their original ground state by emitting a photon of light. According to the law of conservation of energy the same amount of energy used to make the quantum jump is released when the photon light is emitted.
According to this string theory if we were to examine a particle, such as an electron or a proton, at such a microscopic level beyond our current maximum capacity we would find that each particle is not pointlike but is made up of a small one dimensional loop. “Like an infinitely thin rubber band, each particle contains a vibrating, oscillating, dancing filament that physicists . . . have named a string.” (Greene) 2.