The valency of magnesium is

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The valency of an element refers to the number of electrons it loses or gains in chemical reactions to form a chemical bond with another element.

To calculate the valency of magnesium, the following steps can be followed:

  1. Determine the number of electrons in the neutral atom: Magnesium (Mg) has 12 electrons in its neutral state.
  2. Determine the electron configuration of the ion: When magnesium reacts, it loses 2 electrons to form an ion with a charge of +2.
  3. Determine the valency: The valency of magnesium can be calculated as the charge on the ion, which in this case is +2.

Therefore, the valency of magnesium is +2.

Valency of Magnesium

Valency of Magnesium

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CBSE CLASS XII Related Questions

  • 1.

    (i) Why do Zr and Hf exhibit similar properties ?

    (ii) "\( E^\circ \) for \( \mathrm{Mn^{3+}/Mn^{2+}} \) couple is more positive than that for \( \mathrm{Fe^{3+}/Fe^{2+}} \)." Justify the statement.

    [Atomic number : Mn = 25, Fe = 26]


      • 2.

        (a) Define 'Denatured Protein' with an example.

        (b) What happens when glucose reacts with HCN ? Write the reaction involved.

        (c) Name the disease caused by the deficiency of Vitamin C.


          • 3.

            (a) Write two structural differences between DNA and RNA.

            (b) Which component of starch is a branched chain polymer of \( \alpha \)-D-(+)-glucose ? Write its one characteristic feature.

            (c) Which types of bonds hold the polypeptide chains in fibrous proteins ?


              • 4.

                Conductivity of \( 2.5 \times 10^{-4} \) M methanoic acid solution is \( 5.25 \times 10^{-5} \) S cm\(^{-1}\).

                (a) Calculate its molar conductivity.

                (b) Calculate its degree of dissociation.

                [Given : \( \lambda^{\circ}_{(\mathrm{H^+})} = 349.5 \) S cm\(^2\) mol\(^{-1}\) and \( \lambda^{\circ}_{(\mathrm{HCOO^-})} = 50.5 \) S cm\(^2\) mol\(^{-1}\)]


                  • 5.
                    Which of the following curve represents the first order reaction?

                      • A
                      • B
                      • C
                      • D

                    • 6.
                      Following reaction takes place in one step:

                      \(2A + B \rightarrow 2C\)

                      How will the rate of above reaction change if the volume of the reaction vessel is decreased to one third of its original volume? Will there be any change in the order of reaction with the reduced volume?

                        CBSE CLASS XII Previous Year Papers

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