How many unpaired electrons are present in an oxygen molecule?
A) 0
B) 1
C) 2
D) 4
C
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A(n) ________ such as Basque in Europe, is a language unrelated to any other and therefore not attached to any language family
A) isolated language B) dead language C) confining language D) diffusing language E) lingua franca
What ideas brought a renewed interest to the idea of continental drift?
A. evidence that a large meteorite caused extinction of the dinosaurs B. evidence that the entire Earth was once frozen C. data that a submarine mountain occurred beneath the middle of the Atlantic Ocean D. evidence that similar meteorites fall on different continents
Air pollution helps protect building stone from weathering
Indicate whether the statement is true or false
The most studied and well-documented urban climatic effect is the ________
Fill in the blank(s) with correct word