1) Caesium Chloride and Rubidium Bromide Are Halide Compounds of Group I Elements

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1) Caesium chloride and rubidium bromide are halide compounds of Group I elements. Caesium chloride has the formula ……1……, a relative formula mass ……2…… that of rubidium bromide and bonds that are ……3……. Which words correctly completes gaps 1, 2 and 3? 1 2 3 a) CaCl Different from Ionic b) CaCl the same as Covalent c) CsCl Different from Ionic d) CsCl The same as Covalent 2) The nucleon number and proton number of the lithium atom are shown by the 7 symbol 3퐿푖. What is the correct symbol for the lithium ion in lithium chloride? 6 − a) 2퐿푖 6 + b) 3퐿푖 7 + c) 3퐿푖 7 − d) 3퐿푖 3) Which two elements react together to form an ionic compound? element electronic structure R 2,4 T 2,8 X 2,8,1 Z 2,8,7 a) R and T b) T and X c) X and Z d) Z and R 4) The electronic configuration of an ion is 2.8.8. What could this ion be? S2- Ca2+ a) ✓ ✓ b) ✓ c) ✓ d) 5) The table shows the electronic structures of four atoms. Which two atoms combine to form an ionic compound? Atom Electronic structure W 2,1 X 2,7 Y 2,8,4 Z 2,8,8 a) W and X b) W and Y c) X and Y d) X and Z 6) Lithium is in Group I of the Periodic Table. Nitrogen is in Group V of the Periodic Table. Lithium reacts with nitrogen to form the ionic compound lithium nitride. What happens to the electrons when lithium atoms and nitrogen atoms form ions? Lithium atoms Nitrogen atoms Each lithium atom loses one Each nitrogen atom gains three a) electron to form a Li+ ion electrons to form a N3- ion Each lithium atom loses one Each nitrogen atom loses three b) electron to form a Li+ ion electrons to form a N3- ion Each lithium atom gains one Each nitrogen atom loses three c) electron to form a Li+ ion electrons to form a N3- ion Each lithium atom gains one Each nitrogen atom gains three d) electron to form a Li+ ion electrons to form a N3- ion .

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Lecture Notes
Solid State Physics PHYS 40352 by Mike Godfrey Spring 2012 Last changed on May 22, 2017 ii Contents Preface v 1 Crystal structure 1 1.1 Lattice and basis . .1 1.1.1 Unit cells . .2 1.1.2 Crystal symmetry . .3 1.1.3 Two-dimensional lattices . .4 1.1.4 Three-dimensional lattices . .7 1.1.5 Some cubic crystal structures ................................ 10 1.2 X-ray crystallography . 11 1.2.1 Diffraction by a crystal . 11 1.2.2 The reciprocal lattice . 12 1.2.3 Reciprocal lattice vectors and lattice planes . 13 1.2.4 The Bragg construction . 14 1.2.5 Structure factor . 15 1.2.6 Further geometry of diffraction . 17 2 Electrons in crystals 19 2.1 Summary of free-electron theory, etc. 19 2.2 Electrons in a periodic potential . 19 2.2.1 Bloch’s theorem . 19 2.2.2 Brillouin zones . 21 2.2.3 Schrodinger’s¨ equation in k-space . 22 2.2.4 Weak periodic potential: Nearly-free electrons . 23 2.2.5 Metals and insulators . 25 2.2.6 Band overlap in a nearly-free-electron divalent metal . 26 2.2.7 Tight-binding method . 29 2.3 Semiclassical dynamics of Bloch electrons . 32 2.3.1 Electron velocities . 33 2.3.2 Motion in an applied ﬁeld . 33 2.3.3 Effective mass of an electron . 34 2.4 Free-electron bands and crystal structure . 35 2.4.1 Construction of the reciprocal lattice for FCC . 35 2.4.2 Group IV elements: Jones theory . 36 2.4.3 Binding energy of metals .
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Page 1/6 Safety data sheet according to 1907/2006/EC, Article 31 Printing date 21.07.2021 Revision: 21.07.2021 SECTION 1: Identification of the substance/mixture and of the company/undertaking · 1.1 Product identifier · Trade name: Cesium chloride (99.999%-Cs) PURATREM · Item number: 93-5542 · CAS Number: 7647-17-8 · EC number: 231-600-2 · 1.2 Relevant identified uses of the substance or mixture and uses advised against No further relevant information available. · 1.3 Details of the supplier of the safety data sheet · Manufacturer/Supplier: Strem Chemicals, Inc. 7 Mulliken Way NEWBURYPORT, MA 01950 USA [email protected] · Further information obtainable from: Technical Department · 1.4 Emergency telephone number: EMERGENCY: CHEMTREC: + 1 (800) 424-9300 During normal opening times: +1 (978) 499-1600 SECTION 2: Hazards identification · 2.1 Classification of the substance or mixture · Classification according to Regulation (EC) No 1272/2008 The substance is not classified according to the CLP regulation. · 2.2 Label elements · Labelling according to Regulation (EC) No 1272/2008 Void · Hazard pictograms Void · Signal word Void · Hazard statements Void · Precautionary statements P231 Handle under inert gas. P262 Do not get in eyes, on skin, or on clothing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P422 Store contents under inert gas. P501 Dispose of contents/container in accordance with local/regional/national/international regulations. · 2.3 Other hazards · Results of PBT and vPvB assessment · PBT: Not applicable.
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