Unit Test — Unit test Answers
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21
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Which element has the greatest number of valence electrons available for bonding?
A
seleniumB
boronC
calciumD
chlorine22
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Which structure shows the correct electron arrangement in CCl4?
A
A central upper C is single bonded to upper H above, below, and to the left, and single-bonded to upper C l to the right. The C l has three pairs of electron dots, above, right, and below.
B
A central upper C is single bonded to upper C l to the top, bottom, and left; those upper C l atoms have three pairs of electron dots on the sides away from the bond. The C is also single bonded to an upper H to the right.
C
A central upper C is single bonded to upper H above and below, and to upper C l to the left and right. The C l have three pairs of dots, above, below, and to the side opposite the bond.
D
A central upper C is single bonded to upper C l above, right, left, and below. All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond.
23
Which statement is true when a crystal is formed from many metal atoms?
A
There are no bands being formed.B
There are many molecular orbitals.C
There are only unshared atomic orbitals.D
There are many electrons lost to other atoms.24
A solid compound in a sealed container was kept at a very low temperature in a freezer. When placed at room temperature, the substance quickly turned into a liquid. This compound is most likely which of the following?
A
an ionic compound because it has a low boiling pointB
a covalent compound because it has a low boiling pointC
an ionic compound because it has a low melting pointD
a covalent compound because it has a low melting point25
What will most likely happen when two bromine atoms bond together?
A
The atoms will become less stable.B
An ionic bond will hold them together.C
A covalent bond will hold them together.D
A metallic bond will hold them together.Did you find these answers helpful?
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