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27 December, 14:01

Which substance can not be decomposed by a chemical change?

A. Ne

B. N2O

C. HF

D. H2O

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Answers (1)
  1. 27 December, 14:21
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    The answer is A. Ne. You can separate the elements in the other three choices through chemical changes (dissociation, ionization, electrolysis, etc.), but in order to separate the components of Ne, you would need a nuclear reaction (to decompose the nucleus) or a physical change (to strip the nucleus of its electron cloud).
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