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Chapter 8

Chapter 8, Covalent Bonding: vocab and key ideas

QuestionAnswer
Atoms that are held together by sharing electrons are joined by what kind of bond? covalent bond
What is a molecule? is a natural group of atoms joined together by covalent bonds.
An oxygen molecule is an example of what? diatonic molecule
What is a compound composed of molecules called? a molecular compound
A molecular formula is what? the chemical formula of a molecular compound.
What does a molcular formula show? how many atoms of each element a substance contains.
What is the representative unit for an ionic compound? a formula unit
In covalent bonds, why does electron sharing usually occur? so that atoms attain the electron configurations of noble gases.
What does a structural formula represent? the covalent bonds as dashes, and shows the arrangment of covalently bonded atoms.
A pair of valence electrons that is not shared between atoms is called what? unshared pair
Define: double covalent bond a bond that involves two shared pairs of electrons.
What is a bond sharing three pairs of electrons called? triple covalent bond
A covalent bond in which one atom contributes both bonding electrons is called what? coordinate covalent bond
In a coordinate covalent bond, the shared electron pair comes from where? from one of the bonding atoms.
Ehat is a polyatomic ion? a tightly bound group of atoms that has a positive or negative charge and behaves as a unit.
The energy required to break the bond between two covalently bonded atoms is know as what? bond dissociation energy
A large bond dissociation energy corresponds to a _____ covalent bond. strong
What are resonance structures? structures that occur when it is possible to draw two or more valid electrons dot structures that have the same number of electron pairs for a molecule or ion.
Created by: jmhschemistry
 

 



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