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प्रश्न
Find the odd one out and give its explanation.
पर्याय
Lithium
Sodium
Magnesium
Potassium
उत्तर
Magnesium
Explanation-
Magnesium is an alkaline earth metal while others are alkali metals.
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संबंधित प्रश्न
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
What were the limitations of Dobereiner’s classification?
The arrangement of elements in a group of three is known as ________.
The modern periodic table has been evolved through the early attempts of Dobereiner, Newland and Mendeleev. List one advantage and one limitation or all the three attempts.
A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and the of C is 39, what should be the atomic mass of B?
State one example of a Dobereiner's triad, showing in it that the atomic mass of middle element is half-way between those of the other two.
What were the limitations of Dobereiner's classification of elements?
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)
In Dobereiner’s triad containing Li, Na, K, if atomic masses of Lithium & Potassium are 6.9 and 39.1, then what will be the atomic mass of Sodium?
A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and that of C is 39, what should be the atomic mass of B?
Why was Dobereiner's triad discarded?
With an example, explain Dobereiner's Triads.
Can the following groups of elements be classified as Dobereiner's triad:
Na, Si, Cl
Atomic mass of Na - 23, Si - 28, Cl - 35.
Justify your answer.
Can the following groups of elements be classified as Dobereiner's triad:
Be, Mg, Ca
Atomic mass of Be - 9, Mg - 24, Ca - 40.
Justify your answer.
What was Dobereiner’s basis, of classification of elements?
State Dobereiner’s Law of Triads with suitable examples.
Find the odd one out and give its explanation.
Write the characteristic of Dobereiner’s triads?
According to Dobereiner’s triads rule, three elements in an increasing order of atomic mass shows _______.
Write the name.
The atom having the biggest atomic size from period 2.
In Dobreiner's triads, three elements appear to be arranged in ascending order of their atomic number.
State Dobereiner’s Law of Triads.
In Dobereiner’s triads, the atomic weight of the middle element is ______ the of the atomic masses of 1st and 3rd elements.
Pick out the chemically most reactive elements from the given triads.
Li, Na, K F, Cl, Br
Can the following groups of elements be classified as Döbereiner's triad?
- Na, Si, Cl
- Be, Mg, Ca
Atomic mass of Be 9; Na 23; Mg 24; Si 28; Cl 35; Ca 40 Explain by giving reason.
