PPT-Giant Molecular Structures

Or giant covalent structures Allotropes different forms of the same element Carbon has several allotropes the best known being diamond and graphite Structure of part of a diamond molecule. The ions are arranged in a lattice. There is attractive electrostatic forces between the ions which are very strong e.g. sodium chloride ionic lattices. . Give two properties of giant ionic structures. . Examples of Structures. Example 1:. . Metals. are . strong. and . easily shaped. .. Example 2:. . Many substances . form . brittle crystals . which . dissolve. easily in water.. Example 3:. . Diamond. Functional Groups. Constitutional Isomers. Dr. . Sheppard. CHEM 2411. Spring . 2015. Klein. (2. nd. ed. .) sections . 2.1 – 2.6, 4.3. Draw . Lewis structures. …. C. 2. H. 6. CH. 4. O. C. 3. H. 6. Molecular Simluation. Introduction:. Prerequisition: . A powerful computer, fast graphics card,. An efficient way to solve Schroedingers wave equation for many atoms,. A reliable structure or structural model. . Causeway. Tiia Valli. It is located in County Antrim, on the northeast coast of Northern Ireland, about two miles (3 km) north of the town of . Bushmills. .. . Bushmills. . Distillery. Antrim. The. The fossil record. Anatomical, embryological, cellular and molecular similarities. Artificial selection . can be used as evidence for the evolutionary development of a given species. HS‑LS4‑1. Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.. bond found in . metals; holds metal . atoms together . very strongly. Metallic Bond. Formed between atoms of metallic elements. Electron cloud around atoms . Good conductors at all states, lustrous, very high melting points. What do these images have in common?. How are they different?. What do you know about the uses of graphite and carbon?. Learning questions. What are giant covalent molecules?. How are they similar/ different from each other?. Mrs. Page. Essential Idea. Lewis (electron dot) structures show the electron domains in the valence shell and are used to predict molecular shape. .. Nature of Science. Scientists . use models as representatives of the real world – the development of the model of molecular shapes (VSEPR) to explain observable properties.. Some elements exist naturally in . more than one form. .. For example, . carbon. exists naturally as . diamond. and . graphite. .. The carbon atoms are arranged in . different patterns . inside the two materials. This gives them . Gumdrop Molecule Activity . Draw the . L. ewis dot structure for the molecule. Use gumdrops, marshmallows, and toothpicks to build a 3D representation of the molecule. Gumdrop=atom. Toothpick=bond. Small marshmallow=shared electron pair. Jianlin Cheng, PhD. Department of EECS. University of Missouri, Columbia. Spring, 2019. The Genomic Era. Collins, Venter, Human Genome, 2000. DNA Sequencing Revolution. Scientists. Government. Company. Bond LengthsGuanine Bond Lengths Thymine Bond LengthsCytosineBond Lengths N1-C2 1.34 = 0.62 + 0.72 N1-C2 1.37 = 0.67 + 0.70 N1-C2 1.37 = 0.67 + 0.70 N1-C2 1.37 = 0.67 + 0.70 * 1.34,1.34,1.32,1.34 1.32 by Oscar Wilde. Mastery focus . Distinguish between the language of speech and writing . Recognise vocabulary and structures for formal speech and writing, including subjunctive forms. Use passive verbs.