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12.1 (Sec. A&B) & 12.2 Period 5 Group 1 PowerPoint PPT Presentation


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12.1 (Sec. A&B) & 12.2 Period 5 Group 1. Ions. Covalent bonding. Ionic bonding. Url : http://chemwiki.ucdavis.edu/@ api/deki/files/3293/=ionicCl. jpg http://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Covalent.svg/160px-Covalent.svg.png.

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12.1 (Sec. A&B) & 12.2 Period 5 Group 1

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12 1 sec a b 12 2 period 5 group 1

12.1 (Sec. A&B) & 12.2Period 5Group 1


12 1 sec a b 12 2 period 5 group 1

Ions

Covalent bonding

Ionic bonding

  • Url: http://chemwiki.ucdavis.edu/@ api/deki/files/3293/=ionicCl. jpg

  • http://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Covalent.svg/160px-Covalent.svg.png


Subtopic i types of chemical bonds

Subtopic ITypes of Chemical Bonds

  • A bond is a force that holds groups of two or more atoms together and makes them function as a unit.

    Ionic Bonding

  • The strong bonding forces present result from the attraction among the closely packed, oppositely charged ions is the ionic bonding.

    Covalent bonding

  • The type of bonding in hydrogen molecules and many others where electrons are shared by nuclei is called covalent bonding.

  • Q: What is the type of bonding that are between the extremes in intermediate cases?


12 1 sec a b 12 2 period 5 group 1

  • A: Polar covalent bonding

  • url: http://www.chemprofessor.com/imf_files/image005.jpg


Subtopic ii electronegativity

Subtopic IIElectronegativity

  • The unequal sharing of electrons between two atoms is described by a property called electronegativity; the relative ability of an atom in a molecule to attract shared electrons to itself.

    Electronegativity generally:

  • Increases going from left to right across a period

  • Decreases going down a group for the representative elements.

    Polarity

  • The polarity of a bond depends on the difference between the electronegativity values of the atoms forming the bond.

  • Q: How does electronegativity increase and decrease on the periodic table?


12 1 sec a b 12 2 period 5 group 1

  • A: Electronegativity increases going left to right across a period and decreases going down a group.

Url: http://www.grandinetti.org/Teaching/Chem121/Lectures/Electronegativity/assets/ElectronegativityTrends.gif


Subtopic iii stable electron configuration changes

Subtopic IIIStable Electron Configuration Changes

Configuration

  • Metals form ions by losing electrons to achieve the configuration of the previous noble gases.

  • Chemical compounds are always neutral

  • Q: What is the main difference between how metals and nonmetals form ions?


12 1 sec a b 12 2 period 5 group 1

  • A: Metal ions form by losing electrons to match the configuration of previous noble gases. Nonmetals gains.

    url: http://www.chemistryland.com/CHM130W/03-BuildingBlocks/Chaos/Orbitals-d.jpg


Subtopic iv ionic bonding and structures

Subtopic IVIonic Bonding and Structures

  • Strong bonding in these ionic compounds result from the attractions between the oppositely charged cations and anions.

    Structures of ionic compounds

  • To understand the packing of ions, it helps to realize a cation is always smaller than the parent atom, and an anion is always larger than the parent atom.

  • Q: What are the oppositely charged ions used to bond ionic compounds, and how are they different by another?


12 1 sec a b 12 2 period 5 group 1

  • A: Cations and anions; cation is positively charged while anion are negatively charged.

  • url: http://scienceaid.co.uk/chemistry/fundamental/images/polarisation.jpg


Subtopic v ionic compounds containing polyatomic ions

Subtopic VIonic Compounds containing Polyatomic Ions

  • Polyatomic Ions – Charged species composed of several atoms

    Example: Ammonium Nitrate contains the NH4+ and NO3-

  • Q: What are polyatomic ions and give an example?


12 1 sec a b 12 2 period 5 group 1

  • A: Polyatomic ions are charged species composed of several atoms. Example: Ammonium Nitrate

  • url: http://2.bp.blogspot.com/_13rTsbdEqkM/RkZrzSfQ6QI/AAAAAAAAAA8/LriAgPaAZUY/s200/220px-Nitroglycerin-2D-skeletal.png


12 1 sec a b 12 2 period 5 group 1

Quiz

  • Q #1: What is the difference between the atoms used in ionic and covalent bonding?

  • Q #2: How are atoms held together by a force that makes them function as a unit?

  • Q #3: How are polyatomic ions different from simple anions?

  • Q #4: What does the polarity of 1 bond depend on?

  • Q #5: Why must all compounds be electronically neutral?


Answers

Answers

  • A #1: The atoms in ionic bonding are metals and nonmetals while covalent uses nonmetal and nonmetal.

  • A #2: They are held by a bond.

  • A #3: An anion is a negative charge formed by a nonmetal and polyatomic ions are charged species composed of atoms.

  • A #4: It depends on the difference between electronegativity values of the atoms forming that bond

  • A #5: Because all compounds have either a positive or negative charge that cancels out to no charge.


Reference page

Reference Page

  • http://chemwiki.ucdavis.edu/@ api/deki/files/3293/=ionicCl. Jpg

  • http://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Covalent.svg/160px-Covalent.svg.png

  • http://www.chemprofessor.com/imf_files/image005.jpg

  • http://www.grandinetti.org/Teaching/Chem121/Lectures/Electronegativity/assets/ElectronegativityTrends.gif

  • http://www.chemistryland.com/CHM130W/03-BuildingBlocks/Chaos/Orbitals-d.jpg

  • http://scienceaid.co.uk/chemistry/fundamental/images/polarisation.jpg

  • http://2.bp.blogspot.com/_13rTsbdEqkM/RkZrzSfQ6QI/AAAAAAAAAA8/LriAgPaAZUY/s200/220px-Nitroglycerin-2D-skeletal.png


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