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Which of the following elements is the most reactive? A. At B. Cl C. Br D. I How can you tell if it's reactive? What do you look at?
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Which of the following elements is the most reactive?

A. At
B. Cl
C. Br
D. I
How can you tell if it's reactive? What do you look at?

User Takeisha
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Metals are more reactive as you go left and down the columns on the periodic table and non metals become more reactive as you go right and up the columns
User Lee Davis
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