• evaluate technological applications related to the use of isotopes in biology and medicine Copyright © 2012 The Ontario Educational Communications Authority. All rights reserved. ilc.org 2 Lesson 1 Biology SBI4U-C Chemistry Basics In this lesson‚ you will begin to explore the structure and function of the chemical components of living organisms. You will start by reviewing concepts of atomic structure‚ isotopes‚ and chemical bonding‚ as well as the main types of chemical
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Dalton’s theory are that his second law that all atoms of the same element are the same is false because today we have found that there are other kinds of atoms called isotopes. An isotope is an atom that has the same amount of electrons and protons‚ but it has more neutrons that increase its atomic mass. Some examples of isotopes are Carbon 12‚ carbon 13‚ carbon 14‚ Uranium (234‚ 235‚ and 238) and lithium (6‚ 7). Carbon 14 is especially useful because we know its rate of decay and can use to find
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<b>Thesis Statement</b><br>The hydrogen bomb is a nuclear weapon in which light atomic nuclei of hydrogen are joined together in an uncontrolled nuclear fusion reaction to release tremendous amounts of energy. The hydrogen bomb is about a thousand times as powerful as the atomic bomb‚ which produces a nuclear fission explosion about a million times more powerful than comparably sized bombs using conventional high explosives such as TNT.<br><br><b>The Hydrogen Bomb</b><br>The Atomic Bomb Was A Essential
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combination to another. d) When elements combine to form compounds‚ small whole numbers of atoms form molecules. However this was proved to be not entirely correct. Atoms have been split as well as created i.e. nuclear reactions. Also there are isotopes‚ meaning that not all atoms of an element are identical. Therefore theory was forced to CHANGE in regards to these observations contradicting to the theory put forward by Dalton. The distribution of charge and mass in an atom |Particle
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mass unit or amu. Atomic Number - the number of protons‚ which is unique to that element Mass Number - the sum of protons plus neutron in the nucleus of an atom. Atomic Mass - the total mass of an atom. Isotopes - different atomic forms of the same element. Radioactive Isotope - one in which the nucleus decays spontaneously‚ giving off particles and energy. Energy - defined as the capacity to cause change for instance‚ by doing work. Potential Energy - the energy that matter possesses
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These natural isotopes are 63Cu and 65Cu. 63Cu and 65Cu are stable as well. 63Cu has 29 protons‚ 34 neutrons‚ and 29 electrons. 65Cu has 29 protons and 29 electrons as well‚ but 36 neutrons as opposed to 34. The other isotopes are radioactive‚ the most stable being 67Cu. The softness of copper partially explains its high electrical conductivity‚ as well as its thermal conductivity
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analyzed‚ we shall find out if the benefits or limitations of nuclear technology outweigh the other. Nuclear reactors use a very commonly found material as their main source for producing electricity‚ uranium. There are a few different uranium isotopes that exist on earth‚ with uranium-235 as the most powerful and uranium-238 as the most abundant. Uranium-235 is a very fissile material‚ which means that its atoms can be easily split apart by a neutron‚ releasing two lighter nuclei‚ three neutrons
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Chemistry: It is the science concerned with the atomic composition of substances‚ elements and their interactions‚ and the formation‚ decomposition and properties of molecules. -Biological chemistry or Biochemistry is the biological or physiological chemistry of living organisms and of the chemical changes occurring therein. Structure of Matter: All living and nonliving things are composed of matter. Matter; is anything that occupies space and has mass. Mass is the amount of matter in an object
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consideration. On one hand‚ nuclear energy is not renewable‚ so the problem of nuclear waste is still unsolved. Nuclear waste is a waste produced by radioactive fissions. Unlike normal refuse‚ nuclear waste can be very harmful to all creatures. Radioactivity reduces over long periods of time‚ so the waste must be isolated until its radioactive isotopes to decay. For instance‚ a period of 10 to 50 years will make low-level wastes no longer dangerous. Moreover‚ wastes from the core of
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M12/4/PHYSI/HP3/ENG/TZ2/XX 22126515 Physics Higher level Paper 3 Candidate session number 0 0 Examination code Friday 11 May 2012 (morning) 2 1 hour 15 minutes 2 1 2 – 6 5 1 5 INSTRUCTIONS TO CANDIDATES • • • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options. Write your answers in the boxes provided. A calculator is required for this paper. A clean copy of the
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