'Unshared pairs' diaporamas de présentation

Molecular Geometry and 3D Structures of Molecules

Molecular Geometry and 3D Structures of Molecules. Methane Lewis Dot Structure. Sites on an atom. A site is something that takes up space around the atom. Attached atoms Unshared pairs of electrons Total sites = attached atoms + unshared pairs. Carbon is central atom

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MOLECULAR SHAPES

MOLECULAR SHAPES In 1940 Sidgwick proposed an explanation of the shapes of molecules based on Lewis's model of molecular shape. He assumed Lewis's assumption that electrons tend to group in pairs.

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Chapter 13

Chapter 13. Lewis Structures. Lewis Structures. Lewis structures are diagrams that show the bonding between atoms of a molecule, and the lone pairs of valence electrons in the molecule. Steps for Writing Lewis Structures.

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AROMATIC RINGS

AROMATIC RINGS. BENZENE RING HYDROGENS. Ring current causes protons attached to the ring to appear in the range of 7 to 8 ppm. An anisotropy diagram (next slide) shows the origin of the effect. Protons in a methyl or methylene group attached to the ring appear in the range

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Chem. 1-2 Chapter 8

Chem. 1-2 Chapter 8. Molecular Shape. Formulas. Molecular Formula: Specifies how many atoms are in a single molecule of a compound: Ex. Glucose is C 6 H 12 O 6 Empirical Formula: Specifies the ratios in which molecules are present. Ex. Glucose empirical formula is C 3 H 6 O 3

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Covalent Bonding Theories

Covalent Bonding Theories . Hybrid Orbitals. a type of atomic orbital that results when two or more atomic orbitals mix . Hybrid orbitals Flash Animation http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf. Molecular orbitals.

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VSEPR

VSEPR. Valence Shell Electron Pair Repulsion Theory. VSEPR. e- pairs repel each other so they are oriented as far apart as possible. VSEPR Rules. Draw the Lewis Structure for the molecule Count the total number of . . . Bonded regions around the central atom

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Properties and lewis dots notes

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Chemistry 8.3

Chemistry 8.3. 8.3. 8.3. VSEPR Theory. VSEPR Theory: The Valence-Shell Electron-Repulsion Theory states that molecular shapes adjust in order for valence-electron pairs to stay as far apart as possible. 8.3. VSEPR Theory.

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Covalent Bonding and Polarity

Covalent Bonding and Polarity. AP Chemistry Bonding Notes 2. The Majority of chemical substances do not have characteristics of ionic compounds. A chemical bond formed by a shared pair of electrons is called a covalent bond Both atoms acquire a noble gas configuration by sharing.

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Molecular Geometry

Molecular Geometry. NCSCOS Essential Standard Chm 1.2.3. I. VSEPR Theory. Valance Shell Electron Pair Repulsion Gives molecules their shape Pairs of electron repel to be as far apart as possible. II. Shapes (Geometries). Linear A 2 ex: F 2 AB ex: HCl AB 2 (with a double bond) ex: CO 2.

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INTER MOLECULAR FORCES (bonds)

INTER MOLECULAR FORCES (bonds). Occur between molecules Weaker than intra molecular forces. Hydrogen Bonding . One molecule is polar and has a hydrogen in a H-F, H-O, or H-N bond Other molecule has unshared pairs of electrons, usually on F, O, or N F, N, and O are highly electronegative!!!!

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Molecular Geometry and VSEPR Theory

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