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Unit 8 Chem Test

Practice cards for general knowledge in unit 8.

QuestionAnswer
Define Resonance Resonance shows an intermediate between a single and double bond.
Define Expanded Octet A situation where the central atom is surrounded by more than 4 pairs of valence electrons. This happens by utilizing “d” electron orbitals.
Define Electronegativity (EN) Measures the ability of an atom to attract electrons to itself when bonded to another atom.
Define Ionic Bond when two atoms combine through electron transfer.
Define Covalent Bond Forms when two atoms combine by sharing electrons.
When does an ionic bond occur? When the electronegativity is greater than 1.67
What does an ionic bond possess? Covalent character
What is the consistency of an ionic bond? Metal + nonmetal ions in a crystal lattice
What is the melting point of an ionic bond? High
Is an ionic bond a conductor? Only when dissolved in water or in the molten/liquid state
What is an ionic bonds form in room temp? Solid
When does a covalent bond occur? When the electronegativity is less than 1.67
What does a covalent bond possess? Ionic character (Except diatomic molecules like O2
What is the consistency of a covalent bond? Nonmetals + other nonmetals / mettaloids
What is the melting point of a covalent bond? Low
Is a covalent bond a conductor? No
What is a covalent bonds form in room temp? Brittle solid or gas
What is the consistency of a network covalent bond? Nonmetals + other nonmetals or mettaloids
What is the melting point of a network covalent bond? Very high
Is a network covalent bond a conductor? No
Define Molecular Geometry How a molecule is oriented three-dimensionally.
What does VESPR stand for? Valence Shell Electron Pair Repulsion Theory.
Define Polar Bond A bond that contains a positive and negative pole and is, therefore, a “dipole”.
Define Nonpolar Bond A bond that contains no positive or negative poles.
What is the Cardinal Rule of Dissolving? “Like dissolves like” (Polar solutes generally dissolve in polar solutes and vice versa.)
Created by: Collelia000
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