Lecture_13_102011 - Lecture 13: Covalent Compounds Goals:...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 13: Covalent Compounds Goals: Write an electron-dot structure for a covalent compound. Given the formula, write the name for a covalent compound and given the name of a covalent compound write the formula. Use electronegativity to determine the polarity of a bond. Outline (Timberlake 5.5-5.6): ± Covalent Compounds (5.5) ± Naming and Writing Covalent Formulas (5.5) ± Electronegativity and Bond Polarity (5.6) Problems for Extra Practice: 5.39, 5.41, 5.43, 5.45, 5.49, 5.51, 5.53, 5.55, 5.57, 5.63, 5.65, 5.67
Background image of page 1

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

View Full DocumentRight Arrow Icon
Carbon Forms 4 Covalent Bonds In a methane (CH 4 ) molecule, • the central C atom shares 4 electrons to attain an octet • each H atom shares 1 electron with the carbon atom to become stable like He C H
Background image of page 2
• In NH 3 , a N atom is bonded to three H atoms. • The electron-dot structure is written as: Electron-Dot Formula for NH 3 Lone pair of electrons
Background image of page 3

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

View Full DocumentRight Arrow Icon
Electron-Dot Formulas for Some Covalent Compounds
Background image of page 4
Number of Covalent Bonds The number of covalent bonds can be determined from the number of electrons needed to complete an octet.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Guide to Writing Electron-Dot Formulas
Background image of page 6
Single and Multiple Bonds • In a single bond , one pair of electrons is shared. • In a double bond , two pairs of electrons are shared. • In a triple bond , three pairs of electrons are shared.
Background image of page 7

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

View Full DocumentRight Arrow Icon
Electron-Dot Formula of CS 2 Write the electron-dot formula for CS 2 . STEP 1 Determine the atom arrangement. The C atom is the central atom. STEP 2 Determine the total number of valence electrons for 1C and 2S.
Background image of page 8
2 (continued) STEP 3 Attach each S atom to the central C atom using one electron pair. STEP 4
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 38

Lecture_13_102011 - Lecture 13: Covalent Compounds Goals:...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online