WorksheetsChemical Bonding Summative Assessment
Total questions: 20
Worksheet time: 42mins
Name
Class
Date
1.
When an atom of sodium and an atom of fluorine combine, an ionic bond is formed. Which statement correctly describes the behavior of the valence electron in the ionic bond?
a)
An electron from the fluorine atom moves to the sodium atom forming two ions
b)
An electron from the sodium atom moves to the fluorine atom forming two ions
c)
An electron from the fluorine atom is shared with the sodium atom forming one cation
d)
An electron from the sodium atom is shared with the fluorine atom forming one anion
2.
Which of the following pairs is unlikely to form a compound?
a)
K and I
b)
Ca and Cl
c)
Fe and S
d)
Ne and Ar
3.
The reason that salt crystallines, such as KCl, are held together so well is because the cations are strongly attracted to:
a)
neighboring cations
b)
protons in the nucleus of the bonding atom
c)
delocalized electrons
d)
neighboring anions
4.
The lewis dot structure for a compound is shown. Which element could be represented by element X?
a)
Bromine (Br)
b)
Sulfur (S)
c)
Nitrogen (N)
d)
Silicon (Si)
5.
Under standard conditions, water exists as a liquid, but H2S is a gas. This difference in phase can be explained by:
a)
The hydrogen bonding between molecules in water
b)
The hydrogen bonding between molecules in H2S
c)
The greater molecular mass of H2S
d)
The greater atomic radii of H2S
6.
Limestone is a naturally occuring form of calcium carbonate. The correct formula for calcium carbonate is:
a)
CaCO3
b)
Ca2(CO3)2
c)
Ca3CO
d)
Ca2CO2
7.
When an element in group 2A combines with an element in group 5A, they produce a compound. What is the correct bonding ratio between these elements?
a)
2:3
b)
3:2
c)
2:5
d)
5:2
8.
Provide the IUPAC name for NH4NO3.
a)
ammonium nitrogen trioxide
b)
nitrogen hydride nitrate
c)
ammonium nitrate
d)
ammonium (IV) nitrate
9.
Which of the following statements explains why the bond between hydrogen chloride is polar covalent?
a)
Chlorine has a greater atomic mass than hydrogen
b)
Chlorine has a greater electronegativity than hydrogen
c)
Chlorine has a higher ionization energy than hydrogen
d)
Chlorine has a greater number of valence electrons than hydrogen
10.
Which of the following is the correct Lewis structure for ammonia?
a)
A
b)
B
c)
C
d)
D
11.
Which of the following statements best explains why atoms bond?
a)
atoms combine to make new substances
b)
atoms combine to reduce chemical stability
c)
atoms bond to change phase from a liquid to a solid
d)
atoms bond to achieve chemical stability
12.
Two atoms in a molecule have exactly the same electronegativity values. Which of the following best describes the bond that they form and why?
a)
an ionic bond forms because electrons will be transferred from one atom to another
b)
a nonpolar covalent bond because electrons will be shared between the atoms equally
c)
a polar covalent bond because electrons will be shared between the atoms unequally
d)
a metallic bond because delocalized electrons will move between the nuclei
13.
How many and what types of bonds form when hydrogen and oxygen combine?
a)
2 single bonds
b)
2 double bonds
c)
1 single bond
d)
1 double bond
14.
Based on the Lewis structure for H2O, the 3D molecular geometry predicted by VSEPR theory would be:
a)
linear
b)
bent
c)
tetrahedral
d)
planar
15.
Which of the following compounds is formed by a covalent bond?
a)
CoCl2
b)
C2H4
c)
NaCl
d)
NH4NO3
16.
Which compound will form when aluminum bonds with chlorine?
a)
Al3Cl
b)
AlCl
c)
AlCl3
d)
Al7Cl3
17.
Which of the following combinations could be described by the "sea of electrons" model?
a)
gold-silver alloy
b)
gold chloride
c)
Cl2
d)
NaCl
18.
Which statement best compares the properties of ionic and metallic substances?
a)
The bonds of metallic substances are composed of delocalized electrons, the bonds of ionic compounds are composed of transferred electrons
b)
The bonds of metallic substances are composed of isolated electrons, the bonds of ionic substances are composed of shared electrons
c)
Metallic and ionic substances both have high melting points due to crystalline structure
d)
Metallic substances insulate heat and electricity, ionic compounds conduct heat and electricity
19.
Compare thecarbon bonds in C2H6 and C2H2.
a)
The doubles bonds in C2H2 are longer and stronger than the single bonds in C2H6
b)
The double bonds in C2H2 are shorter and stronger than the single bonds in C2H6
c)
The double bonds in C2H2 are shorter but weaker than the bonds in C2H6
d)
Both molecules are nonpolar with identical bonds
20.
Based on the information provided, which of the following correctly identifies bond types?
a)
X is ionic, Y is covalent
b)
X is ionic, Y is hydrogen
c)
X is covalent, Y is ionic
d)
X is Hydrogen, Y is covalent
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