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Test Description: For introductory chemistry students
Instructions: Answer all questions to get your test result.
1) The octet rule says
A
atoms will change their configurations and become a noble gas.
B
atoms become less stable with eight electrons in their outer energy level.
C
atoms become more stable with eight electrons in their outer energy level.
D
atoms will become more reactive and chemically bond with noble gases.
2) A compound composed of electrically charged atoms is called a(n)
A
octet compound.
B
chemically stable compound.
C
ionic compound.
D
covalent compound.
3) Nitrogen has five valence electrons. How many pairs of electrons must two nitrogen atoms share in order for each atom to have eight valence electrons?
A
two
B
zero
C
three
D
one
4) The formation of an ionic bond involves the
A
sharing of electrons
B
transfer of protons
C
transfer of neutrons
D
transfer of electrons
5) Which of the following compounds does NOT contain molecules?
A
H2
B
MgCl2
C
H2O
D
CO2
6) Which of the following groups contain three elements with stable electron configuration?
A
xenon, neon,boron
B
helium, xenon, argon
C
lithium, krypton, argon
D
argon, neon,barium
7) Which of the following is a typical property of an ionic compound?
A
not ductile
B
tendency to shatter when struck
C
poor conductor of electric current when melted
D
low melting point
8) A neutral group of atoms that are joined together by one or more covalent bonds.
A
cation
B
ionic compound
C
polyatomic ion
D
molecule
9) The elements most likely to form more than one type of ion are the
A
halogens
B
alkali metals
C
transition metal
D
alkaline earth metal
10) A type of bond in which two atoms share a pair of valence electrons
A
covalence
B
molecule
C
metallic
D
ionic
*select an answer for all questions
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