Bond Formation (Ionic, Covalent, and Metallic Bonding)

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1. BOND FORMATION RAYMART ENRIQUEZ ISIDRO, LPT

2. CHEMICAL BOND SLIDE 2 A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds . The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds. c ations (positively charged ions) and anions (negatively charged ions)

3. WHY DO ATOMS CREATE CHEMICAL BOND? SLIDE 3 Atoms form chemical bonds to make their outer electron shells more stable . to attain a noble gas configuration or to satisfy the octet rule

4. HOW DO ATOMS FORM BONDS? SLIDE 4 by gaining, sharing, or losing electrons

5. TYPES OF CHEMICAL BONDS SLIDE 5 formed when the valence electrons from one atom are shared between two or more particular atoms METALLIC IONIC COVALENT formed when valence electrons are transferred from one atom to the other to complete the outer electron shell formed when the valence electrons are not associated with a particular atom or ion, but exist as a "cloud" of electrons around the ion centers

6. METALLIC BONDING SLIDE 6 Metallic materials have good electrical and thermal conductivity when compared to materials with covalent or ionic bonding. A metal such as iron has metallic bonding.

7. IONIC BONDING SLIDE 7 is the complete transfer of valence electron(s) between atoms a type of chemical bond that generates two oppositely charged ions the metal loses electrons to become a positively charged cation , whereas the nonmetal accepts those electrons to become a negatively charged anion

8. IONIC BONDING SLIDE 8 Calcium chloride (CaCl 2 ) Potassium sulfide (K 2 S) magnesium sulfide ( MgS )

9. TEST YOUR UNDERSTANDING SLIDE 9 Mg + Br Li + F Na + O Al + O Na + F Na + I Cs + F Ba + F Be + O Be + I Ni + Cl

10. COVALENT BONDING SLIDE 10 is the sharing of electrons between atoms This type of bonding occurs between two atoms of the same element or of elements close to each other in the periodic table bonding occurs primarily between nonmetals

11. TYPES OF COVALENT BONDS SLIDE 11 formed when three pairs of electrons are shared between the two participating atoms SINGLE BONDS DOUBLE BONDS TRIPLE BONDS formed when two pairs of electrons are shared between the two participating atoms formed when only one pair of the electron is shared between the two participating atoms

12. COVALENT BONDING SLIDE 12 Hydrogen chloride or hydrochloric acid ( HCl ) Ethene Molecular formula: C 2 H 4 Empirical formula: CH 2 Propyne (CH 3 )

13. TEST YOUR UNDERSTANDING SLIDE 13 P + Cl H + O O + F Br + H C + O S + O N + H C + Cl P + H C + C O + O

14. CLASSIFY THE GIVEN COMPOUNDS AS IONIC, COVALENT, OR METALLIC BONDING SLIDE 14 Au MgCl 2 Al 2 O 3 CuSn Cu CH 3 CH 2 OH H 2 SO 3 NaCl AlCl 3 NH 3 CaCO 3

15. SLIDE 15

16. That’s all. Thank you very much!  Any Questions?