PDF-STUDENT SAFETY SHEETS42Barium compounds

SubstanceHazardComment TOXICUntil recently it was classed as HARMFUL if swallowed or if dust is TOXICUntil recently it was classed as HARMFUL if swallowed It isirritating to the eyes skin lungs e. Chapter 4.10,4.11 and 5. Combining Elements. When we begin combining elements we make compounds.. Two types. Non-metal and metal. Non-metal and non-metal. Each type has unique physical and chemical properties. Session Objectives. Introduction nitro compounds. Nomenclature. Structure and physical properties. Preparation of nitro compounds. Chemical reactions. Cyanides and isocyanides. . General method of preparation. Byung. . Joon. Lim. 5/14/2013. Dr. Karen . Wetterhahn. . (1948-1997). A professor of chemistry at . Dartmuth. college. Studied the toxicity of heavy metals . A few drops of . dimethylmercury. . on the protective latex gloves.  . 1) . SeF. 6. . . ________________________________________.  . 2) . TeO. 3 . . ________________________________________.  . 3) . H. 2. O. . . ________________________________________.  . 1. st. Year Chemistry. 1. Elements. Elements & Atoms. All substances are made up from tiny particles called atoms. When a substance is made up of only one type of atom it is called an element. The element iron is made up of iron atoms, the element hydrogen is made up of hydrogen atoms, the element sulphur is made up of sulphur atoms and so on.. In 1825, Michael Faraday isolated a hydrocarbon called benzene, which consists of a six-carbon ring with alternating double bonds and the molecular formula C. 6. H. 6. . . Learning Goal . Describe the bonding in benzene; name aromatic compounds, and draw their line-angle structural formulas.. Another way of classifying chemical compounds… . Organic Compounds. In science, organic compounds contain . carbon. (. C. ), and usually . hydrogen. (. H. ). Sometimes other types of atoms are also attached, including: . 1435-1436. 2014-2015. Learning Objectives. . Understand the. . resonance description of structure of benzene. Understand the hybridization in benzene. Understand the relation between the stability of benzene and resonance energy. MACROSCOPIC SCALE. Elements combine to make compounds.. ATOMIC SCALE. Atoms combine to make molecules, or extended structures.. What we’ll cover…. Compound Formulas. Ions. Monatomic. Polyatomic. Ionic Compounds. Covalent Compounds. Formed between two non-metals. Valence electrons are shared between atoms. Binary Covalent Compounds. Contain just two different types of non-metal elements. Some Different Rules. a. calcium oxide . CaO. . b. potassium bromide . KBr. . c. zinc fluoride ZnF. 2. . d. gold (III) iodide AuI. 3. . e. aluminum chloride AlCl. 3. f. iron (II) sulfide . FeS. . g. silver nitride Ag. Chapter 5: Molecules and Compounds. Learning Goals. Write . chemical formulas.. Determine . the total number of each type of atom in a chemical formula.. Classify . elements as atomic or molecular.. Classify . Non living matter and minerals found on earth. The distinction between the organic and inorganic are not . a. bsolute ,but there is much overlap.. It has many applications in every aspect of pharmacy including catalysis in drug synthesis, pigments, surfactants and agriculture. Chemical Interactions Occur between the Valence Electrons. Dots. : represent . valence electrons. When atoms combine to make molecules, they form . chemical bonds.. Valence . electron . interaction.