Ozone is a a(n) ________ of oxygen.
A) isotope
B) allotrope
C) precursor
D) peroxide
E) free radical
Correct Answer:
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Q67: Hydrogen is unique among the elements because
Q68: All of the following elements can exist
Q69: In nature,the noble gases exist as _.
A)monatomic
Q70: All of the halogens _.
A)exist under ambient
Q71: iodine has a(n)_ density and a(n)_ atomic
Q73: The noble gases were,until relatively recently,thought to
Q74: _ has been shown to form compounds
Q75: _ is credited with developing the concept
Q76: Which element is solid at room temperature?
A)Cl2
B)F2
C)Br2
D)I2
E)H2
Q77: Which alkaline earth metal will not react
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