Ionic_compounds__their_structures.pptx - IONIC COMPOUNDS...

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IONIC COMPOUNDS & THEIR STRUCTURES
CHEMICAL BONDS Chemical bond - the force that holds two or more atoms together Valence e- are the only e- used by atoms to chemically bond
DRAW ELECTRON DOT STRUCTURES FOR THE FOLLOWING ATOMS... Al Ne P S Na Mg Al Ne P S Na Mg
REVIEW What are the 3 types of bonding? Match each of the following with the type of bonding it best describes: Sea of electron covalent Transfer metallic Sharing ionic
Electronegativity - the ability of an atom to attract electrons to itself when bonded to another atom See p. 265
ELECTRONEGATIVITY AND BOND CHARACTER Bond Type Electronegativity Difference ionic > 1.70 Covalent < 1.7 polar covalent < 1.7 & > 0.4 nonpolar covalent < 0.4
ARE THE FOLLOWING BONDS IONIC OR COVALENT? N-N H-Cl Na-F S-O 3.04 - 3.04 = 0 3.16 - 2.20 = 0.94 3.98 - .93 = 3.05 3.44- 2.58 = 0.86 covalent covalent ionic covalent H 2 O 3.44- 2.20 = 1.24 covalent
IONIC COMPOUNDS Magnesium metal and the non-metal oxygen readily react to form an ionic solid – magnesium oxide. Notice the brightness of the light produced. Also notice how the properties of the compound are not the same as the elements that formed it.
IONIC COMPOUNDS Remember, ionic compounds are composed of cations and anions. Although they are composed of ions, ionic compounds are electrically neutral as solids (net charge = 0). Electrostatic forces hold these ions together to form an ionic bond (opposites attract) . The formation of an ionic

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