Electron Definition in Science

An electron is a stable negatively charged component of an atom. Electrons exist outside of and surrounding the atom nucleus. Each electron carries one unit of negative charge (1.602 x 10-19 coulomb) and has a small mass as compared with that of a neutron or proton. Electrons are much less massive than protons or neutrons. The mass of an electron is 9.10938 x 10-31 kg. This is about 1/1836 the mass of a proton. In solids, electrons are the primary means of conducting current (since protons are larger, typically bound to a nucleus, and thus more difficult to move). In liquids, current carriers are more often ions. The possibility of electrons was predicted by Richard Laming (1838-1851), Irish physicist G. Johnstone Stoney (1874), and other scientists. The term electron was first suggested by Stoney in 1891, although the electron was not discovered until 1897, by British physicist J.J. Thomson. A common symbol for an electron is e-. The electrons antiparticle, which carries a positive electric charge, is called a positron or antielectron and is denoted using the symbol ÃŽ ²-. When an electron and a positron collide, both particles are annihilated and gamma rays are released. Electron Facts Electrons are considered to be a type of elementary particle because they are not made up of smaller components. They are a type of particle belonging to the lepton family and have the smallest mass of any charged lepton or other charged particle.In quantum mechanics, electrons are considered to be identical to each other because no intrinsic physical property may be used to distinguish between them. Electrons may swap positions with each other without causing an observable change in a system.Electrons are attracted to positive-charged particles, such as protons.Whether or not a substance has a net electric charge is determined by the balance between the number of electrons and the positive charge of atomic nuclei. If there are more electrons than positive charges, a material is said to be negatively charged. If there is an excess of protons, the object is considered to be positively charged. If the number of electrons and protons is balanced, a material is said to be electrically ne utral.Electrons can exist free in a vacuum. They are called free electrons. Electrons in a metal behave as if they were free electrons and can move to produce a net flow of charge termed an electric current. When electrons (or protons) move, a magnetic field is generated.A neutral atom has the same number of protons and electrons. It can have a variable number of neutrons (forming isotopes) since neutrons do not carry a net electric charge.Electrons have properties of both particles and waves. They can be diffracted, like photons, yet can collide with each other and other particles, like other matter.Atomic theory describes electrons as surrounding the proton/neutron nucleus of an atom in shells. While its theoretically possible for an electron to be found anywhere in an atom, it is most probably to find one in its shell.An electron has a spin or intrinsic angular momentum of 1/2.Scientists are capable of isolating and trapping a single electron in a device called a Penning trap. Fr om examining single electrons, researchers have found the largest electron radius is 10-22 meters. For most practical purposes, electrons are assumed to be point charges, which are electrical charges with no physical dimensions.According to the Big Bang theory of the universe, photons had sufficient energy within the first millisecond of the explosion to react with each other to form electron-positron pairs. These pairs annihilated each other, emitting photons. For unknown reasons, there came a time when there were more electrons than positrons and more protons than antiprotons. The surviving protons, neutrons, and electrons began to react with each other, forming atoms.Chemical bonds are the result of transfers or sharing of electrons between atoms. Electrons are used in many applications, too, such as vacuum tubes, photomultiplier tubes, cathode ray tubes,  particle beams for research and welding, and the free-electron laser.The words electron and electricity trace their origins to the ancient Greeks. The ancient Greek word for amber was elektron. The Greeks noticed rubbing fur with amber caused the amber to attract small objects. This is the earliest recorded experimentation with electricity. The English scientist William Gilbert coined the term electricus to refer to this attractive property.

An Important Part of the Romantic Period, The War of the...

The War of the Romantics was an important part of the Romantic music period. It stretched from about 1840 to with its peak in 1860. After the death of Robert Schumann in 1856, the contemporary composers divided themselves into two groups. One of the groups had Franz Liszt as the leader, and Berlioz and Wagner joined him in the way they viewed music. Liszt wanted change and the music composing to evolve and some composers saw his compositions as being too radical (Urpi). These composers on the opposite side, the conservative ones were Johannes Brahms accompanied by Schumann and Mendelssohn. The conservative side wanted to stay with the rules and order from the classical era, while the radicals thought that music could be just as beautiful and meaningful without form. Alan Walker describes the war as â€Å"programme music versus absolute music, form versus content, the oneness versus the separateness of the arts, newness versus oldness, resolution versus reaction† (Weimar Years 338). To the radicals, what mattered in the music were deep feelings, much emotion and expression. Earlier the composers now fighting had been united, they all wanted to leave the past behind and their motto said â€Å"Let the dead bury the dead† (Weimar Years 338). One of the reasons the war took so much space was because they felt that the resolution to this would have a huge impact on the music for the rest of history (Weimar Years 338). Hector Berlioz was the one composer whoShow MoreRelatedThe Fire Side Poets from the Romantic Period of Literature Appreciate Nature586 Words   |  3 PagesThe Romantic period in American Literature dates from 1800-1860. It was a time where people were trying to find a distinctive voice. The Romantic period included letters, poems, essays, books, and art. Most of the authors focused on feelings, which is why its called the â€Å"Romantic† period. The authors can be put into four different groups, The fire side poets, The Transcende ntalist, American Gothic, and The Early Romantics. The fire side authors had an appreciation for nature. Poems were readRead MoreThe And The French Revolution1419 Words   |  6 PagesCasper David Friedrich was a German Romantic artist in the nineteenth century that is most known for his landscape paintings that display the romantic ideals of individualism, nature, physical and emotional passion and an interest in the mysteries of the world. Where did these ideals of Romanticism begin? Taking a look back into the 17th century, there was another intellectual movement that changed society, culture and politics. The Enlightenment was a time period lasting throughout the 18th centuryRead MorePeriods of English Literature1515 Words   |  7 Pagesreadily discerned when looking at England as a whole, not looking at parts of history individually. 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Ro mantic ideas arose bothRead MoreEssay On Narrative Poetry1730 Words   |  7 PagesMi’esha Straughn 21 March 2017 Honors English 5th period The Depths of Narrative Poetry Poetry is a form of art that uses languages for its aesthetic qualities and its notional and semantic content. Poetry can consist of oral or literary works in which the language is used in a manner that is felt by the reader to differ from ordinary prose. Poems are constantly relied on for their effect on imagery, word association, and repetition. The use of these effects to generate feelings and emotions isRead More Walt Whitmans Relation to the Romantic Period Essay973 Words   |  4 Pagesthe classics, an idealistic outlook and finally to a strong religious base. Most of the writers of the Romantic period followed Pantheism God is everything and everything is God ... the world is either identical with God or in some way a self-expression of his nature (Owen 1971: 74). The idea of Pantheism was that everything in the world worked in unity. In some of the works of the Romantic period the expression of nature and humans are not separate entities, but one in the same. Even though in realityRead MoreIrony and Sarcasm in A Mystery of Heroism and War is Kind Essay examples947 Words   |  4 PagesIrony and Sarcasm in A Mystery of Heroism and War is Kind In literature, similar themes are portrayed in many different ways, mostly according to the time period they were written in. A new generation of writers came of age after the civil war, known as the realists. They dominated American fiction from the late nineteenth century to the middle of the twentieth. They took their ideas from the slums of the rapidly growing cities at that time, from the factories replacing farmland, and from

Migration Law Migration Registration Authority

Question: Discuss about the Migration Law for Migration Registration Authority. Answer: Introduction: Migration agents in Australia are abiding by the code of conduct which states the legal and ethical obligations of migration agents in Australia. These agents are registered with the Office of Migration Agents Registration Authority (Office of the MARA). These codes are formed with the objective of provide safety to the client. This code of conduct has legal force because it is set under the Migration Agents Regulations 1998. As per the code of conduct it is the ethical duty of the migration agent that they provide following documents to its client: Schedule 2 of Migration Agents Regulations 1998 states that any agent if agreed to work with the client than it is the duty of the migration agent that he must provide to the client a copy of the consumer guide, and make the record that the copy of consumer guide is provided to the customer. The document which is produced by the authority which contains the information related to migration profession, authoritys functions, information related to legislation which regulates the profession, procedure related to complaint and ethical expectations of client from migration agent is relatively known as consumer guide. The migration agent must informed their clients that it is the right of the client that they receive copies of the application which are made under Migration Act or Migration Regulations, and also the copies of any document which are related to the application. Agent can charge particular amount of the copies he provided to the client. It is necessary that consumer guide must contain the following information under Migration Regulations, and guide the clients of the migration agent on following matters: Information related to migration agent and their code of conduct, and code of conduct ensures that migration agent will: Keep the information of the client confidential, and does not disclose the information without the prior permission of client. Be honest with the client regarding the possibilities of securing a visa. Keep the client informed regarding the status of application, and also inform the client if any changes affect the application. Keep in contact with the client during business hours, and help the client in case of any problem. Charge fees with the client which is reasonable. Behave ethically with the client, and fulfill all the duties of the agent towards the client. Consumer guide must state the complete procedure and functions of the authority, and must state the information related to profession of the migration agent. Consumer guide also state the procedure to follow by the client, if client wants to file a complaint against the agent or authority. Consumer guide must state the ethical and legal duties of the migration agent towards the client, employees and authority, and it also state the reasonable fees of migration agent and other charges. References: ETS Australia, Code of Conduct Extract, Accessed on 2nd November 2016 from: https://www.etsaustralia.org/365_calendar/attachments/newsletter/110701134515_Code%20of%20Conduct.pdf. Migration Agents Regulations 1998 - Schedule 2 Migration Agents Regulations 1998 - Reg 8

Social Dimensions of Education free essay sample

Personality and the action system are the behavioral and the fortitude organism that performs the actions of every society in a community. The basic unit of the society is the FAMILY where love, cooperation, integrity, faith and knowledge begin. The society cannot exist without a family, hence family is the heart of society. The second most important part of society is the. School performs an important function in building the society and nation as a whole. School serves as an institution which provides intellect, knowledge and competitive education and skills of human resources as the product of the school-institution. Therefore Structural functionalism is related to education. Symbolic interaction sees ourselves as an engrave elements in social forces and social structure. Thus, the social self is an active part of the society as a whole. Therefore symbolic interactionism deals with socialization and interaction of everyone which is the main core of social dynamic fundamentals. We will write a custom essay sample on Social Dimensions of Education or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Symbolic interactionism state that human beings are endowed with a capacity for thinking and is shaped by social interaction that can be able to learn the meanings and the symbols that allow them to comprehend and interpret their actions and interactions. These tangled patterns of actions and interactions make up groups and society. Indeed, symbolic interactionism is related to the process of education because everyone of us had been engrave and part of the formed society of intellect-the school. 2. How would you distinguish consensus and conflict? What are the influences on the conflict and consensus theories in the work as a teacher? 1. Order, stability and teaching regulation within the class premise. 2. Agreement among students, parents and other faculties in the school. 3. Maintenance and continuation of strategically, technically and high quality teaching. 4. Shared norms and values as fundamental to school practices. While the influences on the conflict theory in the work as a teacher, are the following;