Question

Answer the followings

9.Explain the correlation between valencies with the group number in the periodic table.

10.What are the steps involved in writing the chemical formula of magnesium chloride?

11. How is distillation more advantageous than evaporation.

Answer 1

Answer:

9.For groups 1-2 and 13-18, the valency is directly related to group number. So, elements in group one, the alkali metals, have one valence electron, those in group two have two valence, those in group thirteen have three electrons, and so on.

10.Hey mate here is your answer

Mg + cl2-----------→Mgcl2(s)

hope it will help you

11.Distillation is more advantageous than evaporation because with evaporation, there is more risk at losing the desired substance to the air. or, this could lead to an impure solution that contains both substances.

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Answer 2

Answer:

9..the number of Valence Electrons is equal to the group number of the Representative elements the relation between the group number and Valence Electrons is that the group number is equal to the number of Valence Electrons.

10.. the chemical formula of magnesium chloride is MGCI2. as magnetism belongs to second group in periodic and forms+2ion and chlorine belongs to halogen family and form -1ion so they react to form MGCI2

11.. distalization is more advantages because with evaporation there is no risk to losing desired substance to the air or this cloud lead to an impure solution that contains both substances.

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