Question

Определите валентность химических элементов по формулах их соединения;NН3,AICI3,Cr2O3,Na3O.

Answer 1

N[III]H3I, Al[III]Cl[I]3, Cr2[III]O3[II], Na3[I]O[III] 

Answer 2

Valency of Chemical Elements in Compounds

NH3 (Ammonia): - The valency of nitrogen in ammonia (NH3) is 3. - This is because in ammonia, nitrogen forms three single covalent bonds with three hydrogen atoms. - Therefore, the valency of nitrogen in ammonia is 3.

AlCl3 (Aluminum Chloride): - The valency of aluminum in aluminum chloride (AlCl3) is 3. - This is because in aluminum chloride, aluminum forms three ionic bonds with three chlorine atoms. - Therefore, the valency of aluminum in aluminum chloride is 3.

Cr2O3 (Chromium(III) Oxide): - The valency of chromium in chromium(III) oxide (Cr2O3) is 3. - This is because in chromium(III) oxide, chromium forms ionic bonds with oxygen, and each chromium atom has a valency of 3. - Therefore, the valency of chromium in chromium(III) oxide is 3.

Na2O (Sodium Oxide): - The valency of sodium in sodium oxide (Na2O) is 1. - This is because in sodium oxide, sodium forms an ionic bond with oxygen, and each sodium atom has a valency of 1. - Therefore, the valency of sodium in sodium oxide is 1.

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