Saharudin 5 Al – Hasseb Sekolah Menengah Sains Banting Contents No | Contents | Page | 1. | Appreciation | | 2. | Introduction | | 3. | Analysis : - Nucleus Of An Atom - Radioactive Decay - The Uses Of Radioisotopes - Nuclear Energy - The Importance Of Proper Management Radioactive Substances | | 4. | Conclusion | | 5. | References | | Appreciation
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into the quantum mechanical hood to check it out. Pay attention to the scenery along the way so you’ll be up to speed when we get there. Matter is composed of atoms. Atomic nuclei are tightly bound protons and neutrons (1H excepted) with electrons hanging out in the electron clouds around them. Also‚ there are chemical bonds between atoms in a lot of different kinds of matter. These bonds involve the borrowing and loaning of electrons (the so-called ionic bonds) or the sharing of electrons (the so-called
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analytical chemistry technique‚ this testing method uses many different tests to get a reaction that would link with different ions. Ions An Ion is an electrically charged particles that are formed when atoms are added or taken way. Metal atoms have positively charged ions and non-metal atoms have negatively charged ions. To work out how many ions a metal and non-metal should have is simple. Metals should have the same amount of charged ions as the group number they are in for example a metal in
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Bonds All chemical bonds consist of _______ that hold groups of atoms together and make them function as a unit. A bond will form if the energy of the aggregate is ______than that of the separated atoms. ____________ – energy required to break a chemical bond Bonding involves ________________. 2 Chemical Bonds‚ cont. In general‚ there are three types of chemical bonds: I. Ionic bond: Transfer of electrons from one atom to another. Seen primarily in M + NM. Bond is an electrostatic
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University of Illinois - Springfield Copyright © 2014 The McGraw-Hill Companies‚ Inc. Permission required for reproduction or display. 1 Bonding • Bonding is the joining of two atoms in a stable arrangement. • Through bonding‚ atoms attain a complete outer shell of valence electrons (stable noble gas configuration). • Atoms can form either ionic or covalent bonds to attain a complete outer shell (octet rule for second row elements). • Ionic bonds result from the transfer of electrons from one element
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Diamond is the ultimate abrasive. Diamond crystallizes in the Isometric system. A diamond is one giant molecule of carbon atoms. Diamond Diamond is Transparent and possesses shiny appearance. Diamond is very hard. Diamond is an excellent electrical insulator. Diamond is the ultimate abrasive. Diamond crystallizes in the Isometric system. A diamond is one giant molecule of carbon atoms. Graphite Graphite is black and possesses dull appearance. Graphite is comparatively softer. Graphite is a good
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greater than 2.4. As the size of an atom decreases the electronegativity increases; so the value increases across a period and decreases down a group. Melting Points: The melting points across Period 3 rise with increasing atomic number until silicon after which they fall dramatically. The metallic structures Melting and boiling points rise across the three metals because of the increasing strength of the metallic bonds. The number of electrons which each atom can contribute to the delocalised
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Calculate the number of moles of each element in 1.25 mol glucose (C6H12O6). c) How many molecules of oxygen atoms are present in 5.00 mol diphosphorus pentoxide? d) Calculate the number of moles of hydrogen atoms in 11.5 mol water. e) A sample of ethanol (C2H5OH) has a mass of 45.6 g.How many carbon atoms does the sample contain?How many hydrogen atoms are present?How many oxygen atoms are present? Percent Composition from Chemical a) What is the percent of C & H in C2H6 ? b) What is the
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arrangement of terminal atoms‚ or groups of atoms about a central atom in a covalent compound‚ or charged ion‚ is determined solely by the repulsions between electron pairs present in the valence shell of the central atom. The number of electron pairs around the central atom can be determined by writing the Lewis structure for the molecule. The geometry of the molecule depends on the number of bonding groups (pairs of electrons) and the number of nonbonding electrons on the central atom. The five important
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The center of an atom is called the Nucleus The nucleus contains both Protons and neutrons The negatively charged particles surrounding the center are called Electrons (3^H)‚ an isomer‚ differs from (1^H) in that: 3^H has 2 more neutrons than 1^H Nitrogen has 7 electrons and thus can form a maximum of ___ covalent bonds with other elements 3 Carbon has 6 electrons while hydrogen has 1 electron. How many covalent bonds can form between a carbon atom and hydrogen atoms 4 In the lab you
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