What is the name for the following polyatomic ion?
PO4-3
A) phosphate
B) phosphorus oxide
C) phosphinate
D) trioxo phosphoride
E) potassium
Answer: A
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a. True b. False Indicate whether the statement is true or false
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A major advantage of a Newtonian reflector over a refractor is:
A) its compact size. B) the elimination of chromatic aberration. C) there are only two lenses to grind. D) the central hole in the mirror is smaller. E) the elimination of the secondary mirror.