CHEM 219 MODULE 7 ELITE PREPARATION
GUIDE WITH VERIFIED QUESTIONS AND
CORRECT ANSWERS
◉ Molecule
Answer: Forms when two or more atoms covalently bond and is
lower in potential energy than its constituents atoms
◉ Lewis structure
Answer: A model that uses electron-dot structures to show how
electrons are arranged in molecules. Pairs of dots or lines
represent bonding pairs.
◉ Sigma bond
Answer: A single covalent bond that is formed when an electron
pair is shared by the direct overlap of bonding orbitals
◉ Pi bond
Answer: A bond that is formed when parallel orbitals overlap to
share electrons
◉ Endothermic reaction
GUIDE WITH VERIFIED QUESTIONS AND
CORRECT ANSWERS
◉ Molecule
Answer: Forms when two or more atoms covalently bond and is
lower in potential energy than its constituents atoms
◉ Lewis structure
Answer: A model that uses electron-dot structures to show how
electrons are arranged in molecules. Pairs of dots or lines
represent bonding pairs.
◉ Sigma bond
Answer: A single covalent bond that is formed when an electron
pair is shared by the direct overlap of bonding orbitals
◉ Pi bond
Answer: A bond that is formed when parallel orbitals overlap to
share electrons
◉ Endothermic reaction