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Chem Test

Chapter 6 Test

QuestionAnswer
How does a covalent bond form between two atoms? shares atams
How does a covelent bond differ from an ionic bond? ionic steals. covalent shares.
What is a molecular bond? space that shares electrons move within
Bond ______ is defined as the average distance between two bonded atoms at their minimum potential energy. length
Bond ______ is defined as the energy required to break the chemical bond between two atoms and separate them. energy
The tendency of an atom to attract bonding electrons to itself when it bonds with another atom is called its _________. electronegitivity
A ________ bond is an attraction between two atoms in which bonding electrons are localized on the more electronegative atom. polar covalent
A ________ bond is an attraction between two atoms in which bonding electrons are shared equally between the atoms. non-polar covalent
A ________ molecule is one that has a partial positive charge at one end and a partial negative at the opposite end. dipole
In general, if the difference in electronegativity between two atoms is between 0 and 0.5, that bond formed is ________. non-polar covalent
If the elecronegitivity difference between two atoms is between 0.5 and 2.1, the bond formed is _______. polar covalent
If the electronegativity difference between two atoms is greater than 2.1, the bond formed is _______. ionic
Name the bond (ionic/covalent) in NaF ionic
Name the bond (ionic/covalent) in polyethylene (carbon/hydrogen) covalent
Name the bond (ionic/covalent) between carbon and sulfur covalent
Name the bond (ionic/covalent) between carbon and fluorine covelent
Name the bond (ionic/covalent) between phosphorus and oxygen covelent
An electron in the outermost energy level of an atom that can participate in bonding is called a ________ electron. valence
A structure in which atomic symbols represent nuclei and inner-shell electrons and in which dots are used to represent valence electrons is called a ______ electron. Lewis
A covalent bond in which two atoms share two pairs of electrons is called a _________ bond. double
A covalent bond in which two atoms share three pairs of electrons is called a _______ bond. triple
A covalent bond in which two atoms share one pair of electrons is a ________ bond. single
A non-bonding pair of electrons in the valence shell of an atom is called a _______ pair. unshared
PbCl^2 Lead (ii) chloride
KCl Potassium chloride
LiO^2 Lithium peroxide
PBr^3 Phosphorus triboride
SF^4 Sodium tetrafloride
N^2O^5 Dinitrogen pentaoxide
Nitrogen monoxide NO
Carbon dioxide CO^2
Carbon tetrachloride CCl^4
Carbon disulfide CS^2
What does VSEPR theory predict? predict shape
What is the VSEPR theory? VALENCE SHELL ELECTRON PAIR REPULSION
How does one unbonded pair of electrons (a lone pair) affect the shape of a molecule? assemetrical
How do multiple unbonded pairs of electrons affect the shape of a molecule? repeal each other (bent)
What evidence is there to support the idea that opposite polar ends of molecules attract each other? it changes properties (magnet w/ water)
How do polarity and shape of molecules relate to the properties of a substance? boiling points differ
Created by: 2170155
 

 



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