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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 point23
Which pair of ions can form an ionic bond with each other and why?
A
Cu and Ag; They are both metal ions.
B
S and O; They have like charges.
C
Br and At; They are both halogen ions.
D
Li and Br; They have unlike charges.
24
Which statement describes a step in the formation of an ionic bond?
A
An attraction occurs between two ions that have the same charge.B
A metal atom forms a cation, and a nonmetal atom forms an anion.C
A more electronegative atom transfers electrons to a less electronegative atom.D
A metal pulls electrons from another metal and produces a force of attraction.25
Some atoms are exceptions to the octet rule by having an expanded octet. Which characteristic is needed for an atom to have an expanded octet?
A
The atom has empty d-orbitals.B
The atom has more than eight valence electrons before bonding.C
The atom has empty p-orbitals.D
The atom has fewer than eight valence electrons after bonding.Did you find these answers helpful?
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