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Which list of elements is placed in order from least reactive to most reactive?
A. Ar, Si, Mg, Na
B. Si, Mg, Na, Ar
C. Si, Na, Mg, Ar
D. Na, Mg, Si, Ar

Sagot :

Answer:

A. Ar, Si, Mg, Na

Explanation:

ar is argon which is an inert gas. its in group 18. whole column is filled with inert gases.

na is sodium. very reactive. its in group 1. whole column is filled with very reactive elements

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