Chemistry Concepts and Applications

Chapter 9: Chemical Bonding

Standardized Test Practice

1
NaCl has a Δ EN of 2.1. What sort of bond does it form

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A)mostly ionic
B)polar covalent
C)covalent
D)metallic
2
Which period of elements would you expect to most strongly experience the shielding effect?

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A)period 2
B)period 3
C)period 4
D)period 5
3
What is the structure of an ammonia molecule?

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A)triangle
B)triangular pyrimid
C)tetrahedron
D)quadrilateral
4
Ethyne is different from ethane in what way?

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A)In ethyne, double bonds form between the hydrogen atoms.
B)In ethyne, a double bond forms between the carbon atoms.
C)In ethyne, a double bond forms between the carbon atom and one hydrogen atom.
D)In ethyne, a triple bond forms between the carbon atoms.
5
__________ is the measure of an atom's ability to attract electrons in a bond.
A)electronegativity
B)ionic radius
C)melting point
D)shielding
6
__________ sharing of electrons results in ionic bonding.
A)Electronegative
B)Equal
C)Highly unequal
D)Slightly unequal
7
In general, __________ are malleable and ductile.
A)metals
B)nonmetals
C)metalloids
D)noble gases
8
A chemical bond that results from a shared pool of valence electrons is called a __________ bond.
A)metallic
B)ionic
C)polar covalent
D)directional
9
When strontium atoms react with oxygen atoms, they form __________ bonds.
A)ionic
B)covalent
C)polar covalent
D)triple
10
In general, electronegativity __________ atomic number within a period.
A)increases with
B)remains constant
C)decreases with
D)is inversely proportional to
11
In ethyne, the carbon atoms share __________ pair(s) of electrons.
A)one
B)two
C)three
D)four
12
The type of analysis based on the movements of a stationary phase and a mobile phase is called __________.
A)chromatography
B)photography
C)titration
D)phase movement
13
The boiling point of methane, CH4, is __________ than that of water.
A)much lower
B)slightly higher
C)much higher
D)slightly lower
14
The CCl4 molecule is __________.
A)linear and nonpolar
B)octahedral and polar
C)tetrahedral and nonpolar
D)tetrahedral and polar
15
In general, electronegativity __________ increasing atomic number within a period.
A)decreases with
B)increases with
C)ins inversely proportional to
D)remains constant with
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