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Lone pair
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#	Item
21	Chemguide – answers NUCLEOPHILIC SUBSTITUTION 1. a) CH3CH2CH2CH2Br or Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2013-04-07 12:08:15 Physical organic chemistry Substitution reactions Carbocation Haloalkane Nucleophile Lone pair Ion Hydroxide Amine Chemistry Cations Chemical bonding
22	Chemguide – answers ELIMINATION MECHANISMS 1. a) It is acting as a base. b) One of the lone pairs on the oxygen of the hydroxide ion moves to form a bond with a hydrogen atom in one of the CH3 groups, producing a neutr Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2013-04-08 12:15:56 Bases Hydrogen bond Supramolecular chemistry Lone pair Hydroxide Chemical bond Alkene Properties of water Alcohol Chemistry Functional groups Chemical bonding
23	Chemguide – answers ADDITION / ELIMINATION REACTIONS 1. a) A nucleophile is a species (an ion or a molecule) which is strongly attracted to a region of positive charge in something else. Water has active lone pairs of Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2013-04-14 12:38:21 Lone pair Ion Nucleophile Hydrogen Lewis structure Hydrogen bond Chemistry Chemical bonding Chemical bond
24	Chemguide – answers ELECTROPHILIC ADDITION – SYMMETRICAL ALKENES 1. a) An addition reaction is one in which two molecules join together to make a bigger one with all the original atoms being present in the new molecu Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2013-03-25 06:11:39 Hydrogen bond Chemical bond Lone pair Alkene Ion Bond length Electronegativity Halonium ion Halogen addition reaction Chemistry Chemical bonding Electrophile
25	The Schottky contact is a fundamental metal-semiconductor contact, and Schottky diodes are currently one of the few commerciall Add to Reading List Source URL: www.materials.cmu.edu Language: English - Date: 2010-08-28 11:56:58 Lone pair Theoretical chemistry Jahn–Teller effect University of California Santa Barbara Teller Materials Research Science and Engineering Centers Chemistry Coordination chemistry Inorganic chemistry
26	I. Rules for Selecting More Important "Canonical" or Contributing Lewis Structures of Molecules 1. Atoms normally form bonds by sharing enough electrons to achieve an octet Add to Reading List Source URL: chemistry.caltech.edu Language: English - Date: 2014-09-25 18:53:17 Lewis structure Orbital hybridisation Lone pair Hypervalent molecule Chemical bond Molecular geometry Dipolar bond Covalent bond Formal charge Chemistry Chemical bonding VSEPR theory
27	Chemguide – answers CO-ORDINATE (DATIVE COVALENT) BONDING 1. This is a covalent bond (a pair of shared electrons) in which both electrons came from the same atom. 2. Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2012-09-06 05:40:39 Chemical bond Atomic orbital Covalent bond Hydrogen bond Lone pair Molecular orbital diagram Molecular orbital Chemistry Chemical bonding Quantum chemistry
28	Experiment 7. Molecular Geometry The geometry of a molecule or a polyatomic ion can be determined using a concept called VSEPR (valence-shell electron-pair repulsion). When you write Lewis structures and you connect tw Add to Reading List Source URL: teachingcommons.cdl.edu Language: English - Date: 2014-03-20 17:23:20 Lewis structure Chemical polarity Chemical bond Covalent bond Molecular geometry Lone pair Resonance Polar bond Trigonal pyramidal molecular geometry Chemistry Chemical bonding VSEPR theory
29	Chemguide – answers BONDING IN CARBONYL COMPOUNDS 1. a) 1s22s22px12py1. b) One of the 2s electrons is promoted by moving it into the slightly higher energy 2pz orbital to give the structure 1s22s12px12py12pz1. Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2013-03-07 07:01:45 Chemical bond Double bond Pi bond Lone pair Sigma bond Atomic orbital Non-bonding orbital Molecular orbital Chemistry Chemical bonding Orbital hybridisation
30	Chemguide – questions SHAPES OF MOLECULES AND IONS (single bonds only) You will need a copy of the Periodic Table. 1. This question is about the shape of the molecule SiCl4. a) How many electrons are there in the outer Add to Reading List Source URL: www.chemguide.co.uk Language: English - Date: 2012-09-13 12:05:53 Charge carriers Physical chemistry Chemical bond Molecular geometry Stereochemistry Lone pair Molecule Electron Ion Chemistry Chemical bonding Quantum chemistry

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