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They used atomic number instead of Atomic Mass to organize the elements
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Why did other chemists not agree with john newland?
Other chemists disagreed with John Newlands primarily because his periodic table, arranged by increasing atomic mass, led to inconsistencies and anomalies, such as grouping elements with differing properties. Additionally, the concept of "octaves" he proposed, where elements with similar properties appeared every eighth element, was seen as overly simplistic and not universally applicable. His ideas were also overshadowed by the more refined periodic table developed later by Dmitri Mendeleev, which better accommodated the periodic trends observed in the elements.
Why is mendeleevs periodic table a model?
Mendeleev's periodic table is considered a model because it organizes elements based on their atomic mass and chemical properties, highlighting periodic trends and relationships among them. This arrangement allowed Mendeleev to predict the existence and properties of undiscovered elements, demonstrating the table's utility in understanding elemental behavior. Additionally, the structure of the table reflects the periodic law, which states that the properties of elements are a periodic function of their atomic mass. Thus, it serves as a foundational framework for modern chemistry, despite later modifications based on atomic number.
What makes up the halogen triad?
This refers to an old "history of science " topic around the work done prior to mendeleevs on Periodic Table. Elements were put in triads with similar properties. The halogen triad was chlorine, bromine and iodine. Pretty useless idea long term but a good start for people who came later.
How did the chemists change mendeleevs periodic table?
Well.... one of the many changes that were made to the periodic table was its appearance. It was coloured in in order for people to recognise the different groups. Red for Group 1, orange for Group 2 etc... Hope this helps. Jeremy Eric Slazkowski, Des Moines, Iowa The Periodic Table was first constructed around 1870 when the Russian chemist Dmitry Mendeleyev catalogued all of the known elements. The elements were arranged according to their similarities. More recently discovered elements were added, and the order of elements became based on their atomic numbers. The modern periodic table has much of the same information as the original one by Mendeleyev, but is arranged somewhat like a chart with elements having similar properties falling into columns called groups or families.
What elements add later to the periodic table?
germanium
Which energy source has been developed and improved by chemists?
One energy source that has been developed and improved by chemists is solar energy. Chemists have worked on improving the efficiency of solar cells, developing new materials for capturing and converting sunlight into electricity, and finding ways to store solar energy for later use.
When did Meyer contribute the periodic table?
Meyer developed a table that was similar to modern periodic table. But his work was published later after Mendeleev.
How did mendellev design the periodic table?
Mendeleev designed the periodic table by increasing atomic mass. But it was later changed to increasing atomic number.
Who is mendeleev and Meyer?
Dmitri Mendeleev and Julius Lothar Meyer were two chemists who independently developed early versions of the periodic table of elements in the 1860s. Mendeleev is often credited with creating the first widely recognized periodic table, organizing elements by their atomic mass and predicting the properties of undiscovered elements. Meyer also arranged elements based on atomic volume and demonstrated periodic relationships, but Mendeleev's table included predictions that later proved accurate, solidifying his legacy in the field of chemistry. Both contributions were crucial in understanding the organization of elements in chemistry.
What happens to someone with periodic paralysis?
A person with periodic paralysis experiences sudden onset of weakness, which gradually subsides, only to return again later.
What is the Halogen Triad?
This refers to an old "history of science " topic around the work done prior to mendeleevs on periodic table. Elements were put in triads with similar properties. The halogen triad was chlorine, bromine and iodine. Pretty useless idea long term but a good start for people who came later.
Why was leaving spaces and gaps in the periodic table later vindicated?
Leaving spaces and gaps in the periodic table allowed for prediction of new elements and their properties, which were later discovered and filled in. This vindicated the decision to leave gaps, as it demonstrated the power of the periodic table in organizing and predicting the properties of elements.
