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PBHS Chem I Ch 8

QuestionAnswer
one of the characteristics of an ionic compound was that it had a ___________ melting point very high
Covalent bonds: instead giving up or accepting electrons, the elements in these compounds play “tug of war” with the electrons, and end up _______________ the electrons sharing
A ___________ is a neutral group of atoms joined together by covalent bonds molecule
_________________ molecule: a molecule consisting of two atoms (usually the same atom). Diatomic
A compound composed of molecules is called a _______________- molecular compound
Molecular compounds have _________ melting and boiling points than ionic compounds lower
Ionic compound is a metal bonded to a non-metal; molecular compound is usually made of two or more __________ non-metals
A molecular formula is the _________________ of a molecular compound; shows how many atoms of each element a molecule contains chemical formula
Formulas do not show ________________ chemical structure
__________________ show the arrangement of atoms in a molecular compound structural formulas
In forming covalent bonds, electron sharing usually occurs so that atoms attain the electron configuration of ___________; this is called the __________ rule noble gases; octet
Two atoms held together by sharing a single pair of electrons are joined by a ___________________ single covalent bond
the structural formula of a hydrogen molecule H-H
A pair of valence electrons that is not shared between atoms is called an ___________________ unshared pair
Atoms form ______________ covalent bonds if they can achieve noble gas structure by sharing two or three pairs of electrons double or triple
structural formula of O2 O=O
Carbon Dioxide CO2; has a ________________ between the carbon and each of the oxygens double covalent bond
Carbon Monoxide (CO) is an example of a different type of covalent bonding Coordinate Covalent Bonding: one atom donates an unshared pair to the bond; This type of compound is said to have two ______________________ and one __________ covalent bonds; coordinate bond
The energy required to break the bonds between two covalently bonded atoms is known as the __________________ bond dissociation energy
A large bond dissociation energy corresponds to a ___________ covalent bond strong
Ozone (O3) displays a single covalent bond and a coordinate covalent bond between the three oxygens; by moving a single electron pair you can shift where the two bonds occur… this is called a ___________________ resonance structure
Two examples of exceptions to the octet rule are ___________ & ___________ NO2 (Nitrogen Dioxide) & BF3 (Boron Trifluoride)
when two or more atoms combine into a molecular compound, their orbitals overlap forming _____________ which apply to the entire molecule molecular orbitals
s-orbital + s-orbital forms a ___________ sigma bond
When p-orbitals overlap side by side, a __________ type of orbital is formed pi-bond
VSEPR stands for ___________ Valence Shell Electron-Pair Repulsion
VSEPR Theory explains and illustrates the ________________ reality of molecules three-dimensional
Created by: kcshiker