Which of the following is a positive ion?

A. Ca+2
B. Na+1
C. Al+3
D. Mg+2
E. all of the above


Answer: E

Environmental & Atmospheric Sciences

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A. A. B. B. C. C. D. D. E. E.

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In contrast to the first two agricultural revolutions, the third one originated in the

A) New World. B) Old World. C) core. D) periphery. E) laboratory.

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a. absolute dating. b. relative dating.

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The chinook wind has been known to cause rapid increases in temperature in the Denver, CO area

Indicate whether the statement is true or false

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