What did Johann dobereiner suggest?
Dobereiner discovered that the relative atomic mass of the middle element in each triad was close to the average of the relative atomic masses of the other two elements. This gave other scientists a clue that relative atomic masses were important when arranging the elements.
How did Johann Wolfgang Döbereiner arrange the elements?
In 1829, a German chemist, Johann Dobereiner (1780–1849), placed various groups of three elements into groups called triads. One such triad was lithium, sodium, and potassium. Triads were based on both physical as well as chemical properties.
Which theory conforms to the law of conservation of mass?
The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.
How did Lothar Meyer contribute to the periodic table?
Meyer did contribute to the development of the periodic table in another way though. He was the first person to recognise the periodic trends in the properties of elements, and the graph shows the pattern he saw in the atomic volume of an element plotted against its atomic weight.
Who is the father of periodic table?
Dmitri Mendeleev
Albert Ghiorso
Periodic table/Inventors
How was the law of conservation of energy discovered?
In 1842, Julius Robert Mayer discovered the Law of Conservation of Energy. In its most compact form, it is now called the First Law of Thermodynamics: Energy is neither created nor destroyed.
Who discovered the triads?
chemist Johann Wolfgang Dobereiner
Dobereiner’s triads were groups of elements with similar properties that were identified by the German chemist Johann Wolfgang Dobereiner. He observed that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties.
How do you show conservation of mass?
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Who first discovered periodic table?
https://www.youtube.com/watch?v=MGLrYaI_UfE