PPT-Covalent vs. Ionic Bonds

How does your sense of smell work If a molecule fits into a receptor site in your nose should all things smell Why do you think you dont smell the molecules of O 2 N 2 or CO 2 in the air . Unit 1 – Chemical Changes and Structure. Bonding and Structure. The Formation of Bonds. Bonds. are . electrostatic forces. (attractions between positive and negative charges) which hold atoms together.. and . Electronegativity. Presented by . Leticia Bonita Prince. Newcastle University 4. th. Year . MChem. Student. Aims of Today. Increase your understanding of bonding and electronegativity. Increase your spatial skills and awareness using software designed by the CCDC. Sugar (Sucrose) Crystals. Table Salt (. NaCl. ) Crystals. Why Draw in Science?. Because you are told to.. Because while you cannot remember the phone number of your family doctor, you can remember how to get to there and which side of the door the door handle is on.. Co = Together. The Octet Rule. The octet rule says that all atoms want to have eight valence electrons, like the noble gases.. One way that atoms can follow the octet rule is by giving and taking electrons… ionic bonding. Chapter 9 ~ most compounds, including those in living organisms, are covalently bonded. What You’ll Learn. I will analyze the nature of a covalent bond. I will name covalently bonded groups of atoms. COVALENT BOND. bond. formed by the . sharing . of . electrons . Covalent . Bonds. Between nonmetallic elements of similar electronegativity. .. Electronegativity = how badly an atom wants to add an electron (non metals have higher electronegativity). Valence Electrons and Bonding. The number of valence electrons (electrons in the outermost energy level) in an atom of an element determines many properties of that element, including the ways in which the atom can bond with other atoms.. Ball-and-stick model. Molecular . Compounds. OBJECTIVES:. Distinguish. between the melting points and boiling points of . molecular. compounds and . ionic. compounds.. Molecular . Compounds. OBJECTIVES:. Bonding. Bonding models for methane, CH. 4. . Models are NOT reality. Each has its own strengths and limitations.. Ga . Standards. Students know . atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds.. Bonding Discussion. Bonding. . Ionic. . Covalent. . Metallic. Determined by difference in Electronegativity between atoms.. Ionic . Compounds. Crystalline . solids (made of ions) . High melting and boiling points . Electron Pairs. Recall that in the Lewis/electron dot diagram, only valence electrons are shown. We consider the shell that they are in to be the valence shell. . These valence electrons give the element its chemical properties, and therefore determine its ability to form chemical bonds. . Covalent bonds . result from the . sharing . of electrons. between two atoms.. A covalent bond is a . two-electron bond . in which the bonding atoms share valence electrons.. A . molecule . is a discrete group of atoms held together by covalent bonds.. Bioc. . 201. بسم الله الرحمن الرحيم. 1. What is Biochemistry?. Simplest definition: . “Chemistry of the living cell”. Uses basic laws of . chemistry. and . biology. to explain processes of living cells.. covalent. Molecular / simple covalent. Graphite. Diamond. Diagram. of structure. Describe how. the bonds are formed. Melting point & why?. Electrical conductivity & why?. Solubility. & why?.