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WorksheetsChapter 18 Review II
Total questions: 55
Worksheet time: 28mins
number that indicates how many electrons
an atom must gain, lose, or share to
become stable
subscript
chemical formula
oxidation number
ionic bond
shorthand that tells what elements a
compound contains and the exact number
of atoms of each element in a unit of the
compound
oxidation number
superscript
subscript
chemical formula
positively or negatively charged, covalently bonded group of atoms
ionic bond
molecule
polyatomic ion
formula unit
compound composed of two elements
binary compound
chemical formula
hydrate
polyatomic ion
describes an atom that has a full outermost energy level
polyatomic ion
covalent bond
chemically stable
chemical bond
molecule that has a slightly positive end and a slightly negative end
nonpolar molecule
polar molecule
ionic bond
ion
the attraction that forms between atoms
when they share electrons
ionic bond
chemical formula
covalent bond
formula unit
the force that holds atoms together in a
compound
chemical bond
chemical formula
polyatomic ion
gravity
a compound that has water chemically
attached to it
nonpolar bond
polar bond
polyatomic ion
hydrate
the force of attraction between the opposite charges of the ions in an
ionic compound
covalent bond
ionic bond
chemical formula
polar bond
molecule made of two identical atoms that share the electrons equally
polar molecule
nonpolar molecule
formula unit
polyatomic ion
a charged particle that has either more or
fewer electrons than protons
molecule
ion
chemical formula
formula unit
Which elements are least likely to react with other elements?
metals
nonmetals
noble gases
transition elements
What is the name for CuO?
copper oxide
copper (I) oxide
copper (II) oxide
copper (III) oxide
Which of the following formulas represents a nonpolar molecule?
N2
H2O
NaCl
HCl
How many electrons are in the outer energy levels of the Halogen Group?
1
2
7
17
Which is a binary ionic compound?
O2
NaF
H2(SO4)
Cu(NO3)2
Which of the following is an example of an anhydrous compound?
H2O
Ca(SO4)
Cu(SO4) x 5 H2O
Cu(SO4) x 2 H2O
Which of the following is an atom that has gained an electron?
negative ion
positive ion
polar molecule
nonpolar molecule
Which of these is an example of a covalent compound?
sodium chloride
calcium chloride
calcium fluoride
sulfur dioxide
Which element is NOT part of the compound NH4NO3?
nitrogen
nickel
oxygen
hydrogen
Aside from hydrogen and helium, when an atom is chemically stable, how many electrons are in its outer energy level?
0
4
7
8
What is the oxidation number of sodium in the compound Na3(PO4)?
3-
1-
1+
3+
Which element is least likely to form an ionic bond with sodium?
phosphorous
sulfur
chlorine
argon
How many electrons are required to complete the outer energy level of a phosphorous atom?
1
2
3
4
How many electrons are in an argon atom?
8
10
18
26
What do the Group 17 elements become when they react with the Group 1 elements?
negative ions
positive ions
neutral
polyatomic ions
What is the name of K(C2H3O2)?
potassium chlorate
potassium acetate
potassium hydroxide
potassium iodide
How many electrons are in the outer energy level of a helium atom?
1
2
3
4
Each molecule of table sugar, C12H22O11, contains
0 atoms of carbon.
1 atom of carbon.
6 atoms of carbon.
12 atoms of carbon.
Often atoms join so that each atom will have
an even number of electrons.
an outermost energy level that is full of electrons.
an equal number of protons and electrons.
more electrons then either protons or neutrons.
The forces that hold different atoms or ions together are
electric currents.
chemical bonds.
physical bonds.
nuclear forces.
Typically, atoms gain or lose electrons to achieve
an exchange of energy.
ionization.
a stable electron configuration.
vaporization.
In the compound MgCl2, the subscript 2 indicates that
there are two magnesium ions for each ion of chlorine.
the chloride ion is twice the size of the magnesium ion.
magnesium and chlorine form a double covalent bond.
there are two chloride ions for each magnesium ion.
Chemical compounds are
less stable than their individual elements.
more stable than their individual elements.
always unstable.
always stable.
The total number of atoms in H2SO4 is
six.
seven.
three.
ten.
Which of the following is an atom that has lost an electron?
negative ion
positive ion
polar molecule
nonpolar molecule
Which compound is formed from a tight network of oppositely charge ions?
sugar, C12H22O11
quartz, SiO2
water, H2O
salt, NaCl
An ionic bond is a bond that forms between
ions with opposite charges.
atoms with neutral charges.
one atom's nucleus and another atom's electrons.
the electrons of two different atoms.
Covalent compounds are formed between
ions.
metal atoms.
nonmetal atoms.
compounds.
In a polar covalent bond,
electrons are shared equally between atoms.
a cation is bonded to an anion.
electrons are transferred between atoms.
electrons are not shared equally between atoms.
Which of the following compounds is NOT a molecule?
H2
NaCl
CO2
H2O
Bromine gains an electron which will give it a
positive charge.
negative charge.
neutral charge.
polar charge.
What kind of a charge does an ionic compound carry?
neutral
positive
negative
unknown
When elements form bonds, it changes their ________ properties.
chemical
physical
mass
chemical and physical
For an ion, the oxidation number is
one less than the charge on the ion.
the same as the charge on the ion.
zero.
always negative.
A binary compound made with nitrogen will end the word
nitrate.
nitrous.
nitrite.
nitride.
A complex ion is
an ion made from a large atom.
a single atom that has formed an ion.
only found in compounds.
an ion with more than one atom.
Which of the following statements correctly describes the substance with the formula KI?
Molecules of potassium iodide contain one atom of potassium and one atom of iodine.
There is a one-to-one ratio of potassium ions to iodide ions.
Potassium iodide is a molecular compound.
potassium iodide is a polyatomic ion.
If copper (II) appears in the name of a compound, it indicated that the compound contains
copper ions with a 11+ charge.
copper ions with a 2+ charge.
copper ions with a negative charge.
two types of copper ions.
Beryllium, Be, and chlorine, CL, form a binary compound with a one-to-two ratio of beryllium ions to chloride ions. The formula for the compound is
Be2Cl.
2BeCl.
BeCl2.
Be2Cl2.
In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains
two carbon atoms.
two oxygen atoms.
a polyatomic ion.
an ionic bond.
The name for the compound Cr2O3 would be written as
chromium (I) oxide.
chromium (II) oxide.
chromium oxide
chromium (III) oxide.
The name dinitrogen tetroxide tells you that this compound contains
two nitrogen and two oxygen atoms.
four nitrogen and two oxygen atoms.
two nitrogen and four oxygen atoms.
four nitrogen and four oxygen atoms.
Which of the following is and example of an anhydrous compound?
H2O
CaCO4
CuSO4 x 5 H2O
CaSO4 x 2 H2O
