The statement that best describes the formation of an ionic compound is:
A) Electrons are transferred from a metal to a non-metal, and the resulting charged particles form a crystalline network.
B) Electrons are transferred from a non-metal to a metal, and the resulting charged particles form a crystalline network.
C) Electrons are shared between two atoms and discrete molecules are formed.
D) Electrons move freely among a network of nuclei in fixed positions.
E) Each atom achieves an octet using electrons provided from an external electrical supply.
Question 2
What is the oxidation number of the chromium atom in Na2CrO4?
A) -2
B) +2
C) +6
D) +7
Question 3
When an enzyme is saturated it
A) has been completely consumed, and that reaction cannot occur again until new enzymes are produced.
B) is in high concentration relative to the substrate, and the reaction rate is directly proportional to substrate concentration.
C) is in low concentration relative to the substrate, and the reaction rate is directly proportional to enzyme concentration.
D) is in low concentration relative to the substrate, and the reaction rate approaches its maximum.
E) none of the above
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