Description : What are the limitations of Dobereiner’s law of triads?
Last Answer : Dobereiner’s classification was not satisfactory, as he failed to arrange all of the then known elements in the form of triads. He could identify only three triads from the elements known at that time
Description : State Dobereiner’s law of triads.
Last Answer : According to Dobereiner’s law of triads: When elements are arranged in the order of increasing atomic masses in groups of three elements, the atomic mass of the middle element of the triad is equal to the average atomic mass of the other two elements.
Description : Iron which resembles Cobalt and Nickel in properties has been placed far away from these elements. This was one of the limitations of : (1) Modern periodic table (2) Newland's law of octaves (3) Dobereiner's triads (4) Mendeleev's periodic table
Last Answer : (2) Newland's law of octaves Explanation: Among the major limitations of Newlands Law of Octaves, some similar elements have been separated from one another while some dissimilar elements have been placed in the same column.
Description : What are Dobereiner’s triads? Give example of 2 triads.
Last Answer : Ans: he arranged the elements in several sets of 3 elements .these sets were called triads which resembled with each other in chemical properties and atomic mass of the middle element was approx the mean of the atomic masses ... 35.5 +127)/2 =81.25 (ii) Calcium (40) ,strontium(88.5) and barium (137)
Description : DRAWBACK OF DOBEREINER’S TRIADS:-
Last Answer : Only known some triads elements are identify from Dobereiner’s triads. Other triads did not obey Dobereiner’s rule. Hence, it is not useful.
Description : Lithium, sodium and potassium form a Dobereiner’s triad. The atomic masses of lithium and potassium are 7 and 39 respectively. Predict the atomic mass of sodium. -Science
Last Answer : Lithium, sodium and potassium form a Dobereiner's triad. The atomic masses of lithium and potassium are 7 and 39 respectively. Predict the atomic mass of sodium. Therefore, the atomic mass of sodium = average of the atomic mass of lithium and potassium = 23.
Description : Why was the system of classification of elements into triads not found suitable? -Science
Last Answer : it is because all the elements discovered at that time could not be classified into triads.
Description : Who Classified Elements as Triads?
Last Answer : Dobereiner
Description : What are triads?
Last Answer : Elements arranged in group of three are called triads.
Description : Why are transistors better than triads ?
Last Answer : Both triodes and transistors act as amplifiers. But due to the large size of the triode valve, there is a problem in installing it in the electronic device. This requires more energy ... and cooling system. But transistors do not have these problems. So transistors are better than triodes.
Description : What are 10 Pythagorean triads using whole numbers?
Last Answer : 3,4,5;9,40,41;6,8,10;5,12,13;30,40,50;90,120,150;10,24,26 Ithink that is 10 if not 300,400,500 and 20,48,52