The interaction of which simple substances can be obtained aluminum sulfide, hydrogen chloride, sodium bromide.

Simple substances enter into reactions forming binary compounds – complex substances consisting of atoms of two elements. At the same time, the less electronegative element gives up all the electrons that are at the last energy level, and the more electronegative one takes as many electrons as it lacks until the last level is completed. Therefore, their valence is equal to the number of donated or attached electrons.
2 Al +3 S = Al2S3,
H2 + Cl2 = 2 HCl,
2 Na + Br2 = 2 NaBr.



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