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Electron Essay Examples

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History of the Periodic Table

Explain how scientific observations led to the development of, and changes to, the periodic table. -Dmitri Mendeleev- first periodic table, organized 63 known elements according to properties, organized into rows and columns and wrote name, mass, and chemical properties on each -Julius Lothar Meyer- independently worked in Germany, similar to Mendeleev -Henry Gwyn Jeffreys Moseley-…

An Apology Letter

The electron microscope was first created in 1933 and magnified up to a million times. First electron microscope was a transmission. It used electrons to recreate an image. Scanning electron microscope developed later, it uses a beam of particles to scan across specimen to recreate image of its surface. They are used for the viewing…

Properties of Allotropes of Carbon

Atomic Radii (pm) of the First 20 Elements: – Atomic radii decreases when moving down a period, as the number of protons increases, which thence increases the effective nuclear charge. – Atomic radii increases when moving down a group, as the number of shells increases, which thence increases shielding. – The downward-sloping pattern on the…

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Absorption of Nuclear Radiation

It was necessary to determine the operating voltage for the G-M counter. Group 7 put the beta source right underneath the sensor and started with a voltage of 200 V, then slowly added more and more voltage until the rate of electrons counted was constant. (This number was 257 V. To this number, 75 more…

Cathode ray tube

I. OBJECTIVE An oscilloscope is the standard instrument that is used to examine time dependent voltages in a circuit. They are widely used in the medical professional to examine the electrical output of a heart, and in operating rooms. The voltage can be drawn on graph paper with the voltage on the vertical axis, and…

Forensic Science

1. What is a comparison microscope? What are the advantages of this microscope? A comparison microscope combines two microscopes into one module. This helps the viewer see what is under each of the lenses at the same time. 2. What are the three substances that generally make up paint? Describe each part. The three substances…

Dream Job Speech (physicist)

Hello my name is, today i will be talking about my dream job or my future job if i could say. my dream job is to be an physicist, an physicist is an expert in physics, and sometimes even dealing with living organisms. But there are many different types of physicist out there. there are…

Investigating the rate of electrolysis

It is known that by passing a constant electric current through a copper sulphate solution the passage of ions through this solution results in copper atoms being dissolved into the solution from the anode, which has a positive charge while positive copper, ions (cations) are also being discharged at the cathode which has a negative…

Factors affecting the resistance of a wire

Introduction: Resistance is a force, which opposes the flow of an electric current around a circuit. Resistance is measured in Ohms. George Ohm discovered that a circuit sometimes resists the flow of electricity. He called this ‘RESISTANCE.’ He even came up with a rule for working out the resistance of a circuit, which was: R=…

How electrostatics influence our lives

INTRODUCTION We all are familiar with the term electricity which comes from batteries and which is used to light bulbs, buzzers, and other electrical devices. We also know that conductors are those objects which conduct electricity easily and insulators do not conduct electricity at all. This is basic knowledge but right now we are going…

Chemical bonding

Chemical bonds are what make up the world. In bonds, elements are held together and form compounds that may have new physical and chemical properties. There are two main kinds of bonds, they ionic and covalent. In bonding the goal of the atoms involved is to reach a level of stability with less energy. In…

Atom and Chemical Bond

A chemical bond is the energy that holds two atoms together in a compound. This energy can be further broken down into ionic bonding and covalent bonding. An ionic bond is a chemical bond characterized by attraction between ions of opposite charge. The formation of an ionic bond involves a complete transfer of electrons between…

Hydrogen Bonding Essay

Hydrogen bonding is a bonding type consisting of dipole and dispersion forces. A hydrogen bond is the attractive force between a hydrogen atom attached to a molecule and an atom of a different molecule. According to the Pauling scale of electro-negativities of the elements, it can be viewed that the three most electronegative elements in…

The Microscope: Science’s Greatest Invention

The microscope has been one of the greatest inventions in the history of science and has had the most impact on the course of science. Ever since the first microscope was invented in 1590, they have improved our knowledge in basic biology and biomedical research, as well as many other things, all of which are…

Science Report on Electromagnetism

This report will be done on the theory of Electromagnetism. Electromagnetism is the force that combines electricity and magnetism. Electromagnetism is found in everyday things that shape our lives. It is the cleanest force used to make energy today, and it is used in almost every home appliance that is in a standard middle classed…

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