{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

4_ChemicalBonding(S) - Chemical Bonding Petrucci Herring...

Info icon This preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 1000 3.0 Chemical Bonding 1 Chemical Bonding Petrucci, Herring Madura and Bissonnette : Chapters 10 and 11 • Aims: To look at bonding and possible shapes of molecules We will mainly do this through Lewis structures To look at ionic and covalent bonds Use valence shell electronic structure to predict shapes of molecules
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CHEM 1000 3.0 Chemical Bonding 2 Problem set Chapter 10 questions 3, 4, 11, 17, 18, 21, 22b), 59, 62, 141 Chapter 11 questions 7, 13, 17
Image of page 2
CHEM 1000 3.0 Chemical Bonding 3 Chemical Bonding Lewis Theory: – Electrons, particularly valence electrons play a fundamental role in chemical bonding. – When elements combine to produce compounds they are attempting to achieve a full valence shell (usually 8 electrons)
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CHEM 1000 3.0 Chemical Bonding 4 Chemical Bonding Lewis Theory: – Electrons can be transferred from one atom to another to make ions. The atoms are then held together by coulombic forces in an ionic bond – More often the only way an atom can gain electrons is by sharing . This sharing produces a covalent bond
Image of page 4
CHEM 1000 3.0 Chemical Bonding 5 Lewis Symbols This is a way of representing the valence electrons in an element – It does not include the inner shell electrons – It does not include the spin of an electron – e.g. Si ([Ne]3s 2 3p 2 ) – N ([He]2s 2 2p 3 ) Si N
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CHEM 1000 3.0 Chemical Bonding 6 Lewis Structures These are the combination of Lewis symbols that represents the sharing or transfer of electrons in a molecule Ionic bonding examples ( electron transfer) Na + Cl [Na] + [ Cl ] - x x Mg + 2 Cl [Mg] 2+ 2 [ Cl ] - x x x
Image of page 6
CHEM 1000 3.0 Chemical Bonding 7 Ionic Compounds We don’t usually see isolated ionic compounds – Normally they are in crystals where one anion (negative) is attached to several cations (positive) and vice versa. Electrical neutrality means the total number of each ion is the same.
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CHEM 1000 3.0 Chemical Bonding 8 Ionic Compounds
Image of page 8