PPT-Covalent Bonds

Types of bonds Ionic bonding results from electrostatic attractions among ions which are formed by the transfer of one or more electrons from one atom to another Covalent bonding results from . 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.. Why do atoms bond?. Atoms gain stability when they share electrons and form covalent bonds.. Lower energy states make an atom more stable.. Gaining or losing electrons makes atoms more stable by forming ions with noble-gas electron configurations.. Elements with high electronegativities (non-metals) will not give up electrons. Bonds are not formed by a transfer of electrons, they are formed by sharing electrons.. Molecules are neutral groups of covalently bonded atoms. Compare and contrast ionic bonds to metallic bonds. What makes them different and what makes them similar?. Write down your answer in your notebook.. Covalent Bonding. Chemistry Ch. 8. Today’s Objective. 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). 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.. Covalent bonding. Ionic bonding. Ionic Bonding. Bonding as you’ve never imagined it. http://www.youtube.com/watch?v=BCYrNU-7SfA. Objectives. To consider the features of ionic and covalent bonds, and the compounds they make. 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. . Ionic bonds . result when electrons are transferred between atoms. Covalent bonds . result when valence electrons are shared between atoms. Types of Bonds. Formed between a . metal. and a . non-metal. Section . 2: Ionic and Covalent Bonding. Objectives. Why do atoms form bonds?. How do ionic bonds form?. What do atoms joined by covalent bonds share?. What gives metals their distinctive properties?. Covalent Bonds. Covalent bonds:. occur between two or more . nonmetals. ; electrons are . shared. not transferred (as in ionic bonds). The result of sharing electrons is that atoms attain a more stable electron configuration.. 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..