Types of Bonding Chemical Bond: Chemical Formula:

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Presentation transcript:

Types of Bonding Chemical Bond: Chemical Formula: attraction b/w the nuclei & valence e- of different atoms thus binding atoms together. Chemical Formula: represents #s of atoms of each kind in compound by using symbols & # subscripts.

What does electronegativity mean again?

What group is the most stable?

Bigger Electronegtivity Value – Smaller Electronegitivity Value Type Ionic Covalent Determine Electronegitivity Difference of : 1.71 + 0-1.70 Practice: Bigger Electronegtivity Value – Smaller Electronegitivity Value Na-Cl= K-Br= P-Cl= Li-F= Mg-O= I-Br= Description Transfer of electrons; Cation(+) is then electrically attracted to the anion(-) Usually between a metal & non-metal Sharing of electrons; Always between non-metals Structure VSEPR: see later notes

Type Ionic Covalent Beaker A: Table Salt ( NaCl) Properties Strong Electrical Attraction High Melting & Boiling Point Hard but Brittle Dissolve in H2O: ions break apart Conductors: only in liquid state - Melted or dissolved - Need FREE metal ions Strong Bond Interaction between 2 or more molecules is weaker than ionic Low Melting Point Low Boiling Point Demo Beaker A: Table Salt ( NaCl) Beaker B: Table Salt (NaCl) dissolved in H2O Beaker C: Sugar (C6H12O6) Beaker D: Sugar (C6H12O6) dissolved in H2O Questions: What did you observe for each beaker? Explain why these observations make sense.