CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Dobereiner's Triads

Can the follo...

Question

Question 29
Can the following groups of elements be classified as Dobereiner’s triad?

(a) Na, Si, Cl

(b) Be, Mg, Ca

Atomic mass of Be 9; Na 23; Mg 24; Si 28; Cl 35; Ca 40. Explain by giving reason.

Open in App

Solution

(a) No, because all these elements do not have similar properties although the atomic mass of silicon is average of the atomic masses of sodium and chlorine.

(b) Yes, because they have similar properties and the mass of magnesium is roughly the average of the atomic mass of Be and Ca.

Suggest Corrections

thumbs-up

1

Similar questions

Q. Can the following groups of elements be classified as Dobereiner's triads?

(a) Na, Si, Cl
(b) Be, Mg, Ca
Give reason for your answer.
(Atomic masses : Be 9 ; Na 23 ; Mg 24 ; Si 28 ; Cl 35.5 ; Ca 40)

Which will be the third element among the given elements to complete the given Doberiener triad?

(Atomic mass of

Be= 9, Na= 23, Mg= 24, Si= 28, Cl= 35, Ca= 40

Na, __ , Cl

Which will be the third element among the given elements to complete the given Doberiener triad?

(Atomic mass of Be 9; Na 23; Mg 24; Si 28; Cl 35; Ca 40)

Question 17
Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al

(a) Cl > Si >Al > Mg >Na
(b) Na >Mg >Al >Si > Cl
(c) Na > Al > Mg > Cl > Si
(d) Al > Na> Si > Ca> Mg

Q. Consider the following orderings:

I

A l > S i > P > C l

I I

B e < M g < C a < S r

I I I

I < B r < C l < F

I V

{N a}^{+} < {M g}^{2 +} < {A l}^{3 +} < {S i}^{4 +}

Which of these give(s) a correct trend in ionization energy?

View More

Join BYJU'S Learning Program

explore_more_icon

Explore more

Dobereiner's Triads

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon