Electron microscope

of two cyclopentadienyl (Cp) rings attached to opposite sides of iron. The “η5” hapticity indicates that five atoms from the Cp ligand are coordinating to the iron ion. The iron contributes six electrons with it’s oxidation state of 2+, and the Cp rings each contribute six electrons. Thus, the total electron count of…

Early Atomic Experiments Joseph John Thomson conducted an experiment that is known today as the CRT Experiment. The outcome of this experiment was JJ’s discovery of the electron. CRT is an acronym for Cathode Ray Tube, this gives a broad concept of what the experiment is about. The basic components of the experiment include, a glass cylindrical tube with most of the air inside vacuumed out of it, and inside the tube is Electrode for each side. One of the Electrodes is negative and entitled the…

The objective: Through a scientific invention the student will create a model that transmits electrical current and demonstrate that electricity travels in a closed path. Materials: (6) light bulb, (6) battery, (6) 6 in. insolated copper wires, (6) wire stripper, (6) switches, (21) safety goggles, (21) aprons, and boxes of gloves. Vocabulary: Circuit, closed circuit, open circuit, electrical circuit, electromagnetic, and parallel circuit Engaged: We are going to do a KWL chart to find out, what…

Electrons can be core or valence. The core electrons are like nobel gases and the valance are the rest. Like noble gases, core electrons do not react, but valence electrons do. Imagine, if you will, a reaction of sodium with chlorine gas. The sodium gives up a valence electron and chlorine gains one. The compound made is 1:1 Na:Cl. A similar thing happens with potassium and bromine, you get KBr. The electron configuration of sodium is 1s2 2s2 2p6 3s1. The part up to 2p is just like the nobel…

In our time and age, many inventions depend on the use of static electricity such as printers, photocopiers , pollutant removers and even spray painting. Now imagine how our world would differ if we did not have the implementation of static electricity in inventions such as photo copiers or printers. These simple inventions solve big problems. What is static electricity? How do printers work? Why do we need Printers? What are the advantages and disadvantages of the use of printers? These factors…

number of 11. This element has 11 protons, 11 protons, and about 11 neutrons. Protons have a positive charge, electrons have a negative charge, and neutron have a neutral charge. Electron shells are the outer parts of an atom containing the electrons. Valence electrons are electrons in the outermost shell. Valence electrons tell us whether an atom shares, transfers or receives electrons to become stable 3. Nucleic acids are organic molecule composed of nucleotides. The role of nucleic acids are…

stable one, while tritium has a half-life of roughly twelve years, making it slightly radioactive (Unterweger et al.; Wanjek). However, tritium has a higher binding energy than deuterium making it a more efficient fuel (Watkins). The deuterium-tritium reaction has a yield of roughly 17.6 MeV whereas the deuterium-deuterium reaction only has a yield of about 3.65 MeV. Still, the DT reaction has its disadvantages. For one, in the DT reaction about 80% of the energy is stored in a high-energy…

purpose of the experiment, “Charge to Mass Ratio for an Electron”, was to measure the charge-to-mass ratio (e/m) for an electron. This lab was performed to help students further understand the characteristics of an electron in regards to various things such as its magnetic field strength and velocity. By using a Daedalon (e/m) Apparatus paired with Helmholtz coils and a glass bulb filled with helium gas, students were able to observe electrons travelling in a circular path. This is due to the…

Pure metals are of very less application in engineering as of the need of conflicting property requirement. For e.g. an application may need a material that is both hard and ductile, there is no any such kind of substance existing in nature. For this present problem, combination (in liquid state) of one material with other material is used. This mixing of materials in the molten liquid state is termed alloying ,that provides a property that is not similar to the original materials. Bronze…

determined by the electrons in a compound.1 As electrons move around, they can absorb energy and become excited. The energy, and thus the wavelength of light, the electrons absorb is determined by the type of atoms found in the compound and how those atoms are bound together. Different environments for electrons will also determine how much of a particular wavelength of light can be absorbed, a parameter which is reflected…