Can the following groups of elements be classified as Dobereiner's tri

1.	Can the following groups of elements be classified as Dobereiner's triad: (a) Na, Si, Cl (b) Be, Mg, CaAtomic mass of Be-9, Na-23, Mg-24, Si-28, Cl-35, Ca-40, Justify your answer in each case
Answer» (a) Na, Si, Cl No, because there physical properties are not same although the atomic mass of silicon is average of atomic mass of sodium and chlorine. (b) Be, Mg, Ca Yes, because they have similar properties and mass of Mg is roughly the average of atomic mass of Be & Ca.

Can the following groups of elements be classified as Dobereiner's triad: (a) Na, Si, Cl (b) Be, Mg, CaAtomic mass of Be-9, Na-23, Mg-24, Si-28, Cl-35, Ca-40, Justify your answer in each case

Answer»

(a) Na, Si, Cl No,

because there physical properties are not same although the atomic mass of silicon is average of atomic mass of sodium and chlorine.

(b) Be, Mg, Ca Yes,

because they have similar properties and mass of Mg is roughly the average of atomic mass of Be & Ca.

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Can the following groups of elements be classified as Dobereiner's triad: (a) Na, Si, Cl (b) Be, Mg, CaAtomic mass of Be-9, Na-23, Mg-24, Si-28, Cl-35, Ca-40, Justify your answer in each case

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