what is a electron
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Electron Definition - Chemistry Glossary Electron Definition: An electron is a negatively charged component of an atom. Electrons exist outside of and surrounding the atom nucleus. Each electron carries one unit of negative charge and has a very small mass as compared with that of a neutron or proton. By Anne Marie Helmenstine, Ph.D.
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Electron (or Vacuum) Tubes Electron (or Vacuum) Tubes. An electron tube (also known as a 'Vacuum tube', or a 'Valve' ) is a glass or metal enclosure in which electrons move through the vacuum or gas from one metal electrode to another. The vacuum tube is often used to amplify weak currents or act as a one-way valve (rectifier) for electric current. Before the 1947 invention of the transistor the electron tube was the basis of virtually all electronic devices. The simplest kind of electron tube is the diode, which was invented in 1904 by John A. Fleming.
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atom atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element. substance - the real physical matter of which a person or thing consists; DNA is the substance of our genes.
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atom by Jerry Coffey on February 17, 2010. The atom definition is: A unit of matter, the smallest unit of an element, having all the characteristics of that element and consisting of a dense, central, positively charged nucleus surrounded by a system of electrons.
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electron Definition of electron. : an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109 × 10−31 kilogram or about 1⁄1836 that of a proton.
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What is an Atom? Protons and neutrons are heavier than electrons and reside in the nucleus at the center of the atom. Electrons are extremely lightweight and exist in a cloud orbiting the nucleus. The electron cloud has a radius 10,000 times greater than the nucleus.
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What is An Atom? - Definition & Examples An atom is the basic unit of a chemical element. Everything in the world is made out of atoms. Your computer monitor is made out of atoms. The desk it sits on is made out of atoms. So is the air you're breathing. In fact, you are also made out of atoms.
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What is an Atom? Protons and neutrons are heavier than electrons and reside in the nucleus at the center of the atom. Electrons are extremely lightweight and exist in a cloud orbiting the nucleus. The electron cloud has a radius 10,000 times greater than the nucleus. Protons and neutrons have approximately the same mass.
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electron If you take chemistry, you will learn about electrons. Electrons are the smallest of the particles that make up an atom, and they carry a negative charge. The number of protons and electrons is equal in each atom. The hydrogen atom, for example, has just one electron and one proton. The uranium atom, on the other hand, has 92 protons, and therefore, 92 electrons. The atom's atomic number is the number of protons in the atom, which by default is also the number of electrons. An electron is so small that it cannot be seen with the naked eye, but neither can the atom itself.
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electron volt electron volt (plural electron volts) (abbreviated eV) (physics) A unit for measuring the energy of subatomic particles; the energy equal to that attained by an electron moving through a potential difference of one volt. Equivalent to 1.6022 x 10-19 joules.
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What are Electrons [/caption] If you have heard of electrons you know that they have something to do with electricity and atoms. If so you are mostly right in describing what are electrons. Electrons are the subatomic particles that orbit the nucleus of an atom. They are generally negative in charge and are much smaller than the nucleus of the atom.
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Where is Puerto Vallarta Located? PV or Vallarta (as locals call the place) is a city located on the Pacific Coast of Mexico in the State of Jalisco within a large bay called Banderas Bay (Bay of Flags) or Bahía de Banderas. Check out the map.
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- An electron is a subatomic particle with a negative electric charge. Electricity, a form of energy, is caused by moving electrons. The electron was the first subatomic particle to reveal itself, and that discovery was predicated on the study of electric currents in solids, liquids and gases. We know that charge is a property of substantial matter and that it's quantized.
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electrode electron gun - the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it
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What is Atom at·om. n. 1. A unit of matter, the smallest unit of an element, having all the characteristics of that element and consisting of a dense, central, positively charged nucleus surrounded by a system of electrons.
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Electron transfer Electron transfer. Electron transfer (ET) occurs when an electron relocates from an atom or molecule) to another such chemical entity. ET is a mechanistic description of a redox reaction, wherein the oxidation state of reactant and product changes. Numerous biological processes involve ET reactions.
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Electronvolt In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately 1.6 × 10 −19 joules (symbol J). By definition, it is the amount of energy gained (or lost) by the charge of a single electron moving across an electric potential difference of one volt. Thus it is 1 volt (1 joule per coulomb, 1 J/C) multiplied by the elementary charge (e, or 1.602 176 6208 (98) × 10 −19 C).
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- 1 Electrons-Subatomic particle that has almost no weight and carries a negative charge; orbits in a shell about the nucleus of an atom. 2  Neutrons-Subatomic particle that has a weight of one atomic mass unit, carries no charge, and is found in the nucleus of an atom.
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What is an Atom? 1 Atoms are made of extremely tiny particles called protons, neutrons, and electrons. 2  Protons and neutrons are in the center of the atom, making up the nucleus. 3  Electrons surround the nucleus. 4  Protons have a positive charge.  Electrons have a negative charge.
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Definitions &Translations An ion is an atom (or group of atoms) that has lost one or more electrons, giving it a net positive charge (cation), or that has gained one or more electrons, giving it a net negative charge (anion).
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- LINK / CITE ADD TO WORD LIST. noun. The definition of an electron is the lightest basic electrically-charged particle. An example of an electron is what orbits the nucleus of an atom.INK / CITE ADD TO WORD LIST. noun. The definition of an electron is the lightest basic electrically-charged particle. An example of an electron is what orbits the nucleus of an atom.
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- In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately 1.6×10−19 joules (symbol J). By definition, it is the amount of energy gained (or lost) by the charge of a single electron moving across an electric potential difference of one volt. Thus it is 1 volt (1 joule per coulomb, 1 J/C) multiplied by the elementary charge (e, or 6981160217662079999♠1.6021766208(98)×10−19 C).
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Atom Definition and Examples Atom Definition. An atom is the defining structure of an element, which cannot be broken by any chemical means. A typical atom consists of a nucleus of protons and neutrons with electrons orbiting this nucleus. However, an atom can consist of a single proton (i.e., the protium isotope of hydrogen) as a nucleus.
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What is an Atom? Protons and neutrons are heavier than electrons and reside in the center of the atom, which is called the nucleus. Electrons are extremely lightweight and exist in a cloud orbiting the nucleus. The electron cloud has a radius 10,000 times greater than the nucleus. Protons and neutrons have approximately the same mass.
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atom atom definition. A unit of matter; the smallest unit of a chemical element. Each atom consists of a nucleus, which has a positive charge, and a set of electrons that move around the nucleus. (See Bohr atom.) Note: Atoms link together to form molecules.
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ion An ion is an atom or group of atoms in which the number of electron s is different from the number of proton s. If the number of electrons is less than the number of protons, the particle is a positive ion, also called a cation. If the number of electrons is greater than the number of protons, the particle is a negative ion, also called an anion. When an atom of an element is short an electron, a plus sign is placed after its chemical symbol as a superscript to indicate that fact.