2-Define Isotopes give two examples of isotopes An isotope is a variant on an element that has a different atomic weight from other variants. Except for hydrogen —this has only a proton. All atoms of an element have the same atomic number. However‚ some of the atoms of that element differ in mass number because they have different numbers of neutrons‚ though they behave identically and have the same number of protons. For example‚ a nitrogen atom has 7 protons and its common isotope has 7 neutrons
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In life it up to an individual person to decide whether or not to look at the glass half full or half empty. Throughout chapter 1-3‚ and the view of psychology in general seems emphasize the glass being half full rather than half empty. Two things that seem to apply to my life was chapter one over behaviorism and chapter three depression. During the 1890s Ivan Pavlov ran an experiment based on innate response. His experiment was based of dogs and their behavior with potential stimuli. In this situation
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Is Your Glass Half Full or Half Empty? Is Your Glass Half Full or Half Empty? Shakespeare quotes “there is nothing good or bad but thinking makes it so.” These are words of wisdom‚ as Shakespeare had discovered centuries ago that are still relative to the daily events that occur for the average twenty-first century adult. People often waste too much time thinking about small negative aspects of their day which creates added stress that is not necessary. Like over analyzing every detail of
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Isotopes‚ sub-atomic particles and relative atomic mass Sub-atomic particles A subatomic particle is a particle smaller than an atom: it may be elementary or composite. In 1905‚ Albert Einstein demonstrated the physical reality of the photons‚ hypothesized by Max Planck in 1900‚ in order to solve the problem of black body radiation in thermodynamics. In 1874‚ G. Johnstone Stoney postulated a minimum unit of electrical charge‚ for which he suggested the name electron in 1891. In 1897‚ J. J. Thomson confirmed
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Variables - any factor that can change in amount or kind over time. Eg age‚ time‚ IQ‚ memory etc An experiment tests the cause-effect relationship between variables Independent variable – the variable that is systematically manipulated‚ changed or varied in some way by the experimenter‚ in order to assess its effect on participant’s responses (DV) Dependent variable – the variable that the experimenter is measuring‚ shows any effects of the IV It is called the DV because whether or not it will
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In this essay I am going to illustrate how power turn can change people‚ or in this case‚ half person half god. Gilgamesh is not the only king or governor that has been terrible throughout history. I will compare Gilgamesh with other kings that have been known as bad kings that only cared about themselves‚ as well compare the similarities between him and today’s governors. Gilgamesh was the king of Uruk; he was two-thirds god‚ one-third man. He became a bad king because the gods created him as
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simple‚ it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon‚ isotopes were discovered‚ as atoms of the same element which have been built up to have different masses. Purpose The purpose of this lab is to investigate the mass properties and relative abundance of isotopes for the “bean bag” element (symbol‚ Bg)‚ and to calculate the atomic mass of this element. Equipment and Materials Balance centigram (0.01-g
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Neither Half Full nor Half Empty “Get off of me! Get off of me!” he yelled as he was being backed into the corner of the kitchen. Johnny was getting the shit kicked out of him but what was he supposed to do? Hit his own mother? After enough blood dripped down his face he had to do what he had to do. Johnny never thought of hitting his mother before but with a quick move he picked up in wrestling practice a few seasons ago he quickly ducked under his moms swinging arms and around her back to get
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Radioactive Decay‚ Nuclear Fission and Nuclear Fusion When elements undergo radioactive decay the atoms of one element are changed into the atoms of another element when an alpha or beta particle is emitted from an unstable nucleus. When a nucleus disintegrates and emits an alpha particle it is alpha decay‚ the alpha particle emitted contains two protons and two neutrons which is equivalent to a helium nucleus being released. Alpha decay occurs because there are too many protons‚ which causes
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was‚ at the time‚ the most efficient way of separating the 235 U and 92 238 U isotopes.1 92 The question of why scientists entertained the idea of a uranium bomb at all is an intriguing one. Bohr had already demonstrated that uranium‚ when undergoing slow fission‚ gives off neutrons. When those neutrons strike impure 238 U‚ a new element is produced: 92 Neptunian. Neptunian‚ undergoing beta decay with a half-life of about 56 hours‚ produces plutonium—plutonium‚ like 235 U‚ is fissionable.2 The
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