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Mendeleev had spent a lot of time and energy arguing that tellurium must have a lower atomic weight than iodine, so that tellurium could fit in with selenium and sulfur, and iodine with bromine and chlorine. But the best work available consistently showed that tellurium had an atomic weight about 1% higher than iodine. With Moseley's work it became clear that although tellurium had a higher atomic weight than iodine, it had a lower atomic number. Similarly he had always had tables that assigned the same atomic weight to cobalt and nickel, while the experimental work showed that nickel had an atomic weight about 0.2% lower than cobalt, but an atomic number that was one greater. And the recently discovered noble gas argon had an atomic weight 2% greater than that of the next element, potassium, but an atomic number that was one less. These three exceptions to Mendeleev's periodic law, led to the modern form of the same law: if the elements are arranged in the order of their atomic NUMBER, then their properties repeat in a periodic fashion.
What else can I help you with?
What were Henry morsely's efforts to the periodic table?
Henry Moseley contributed to the periodic table by arranging elements based on atomic number rather than atomic mass, establishing the modern periodic law. His work led to a more accurate arrangement of elements and a better understanding of their properties. Moseley's discovery helped fill gaps in the periodic table and laid the foundation for the modern understanding of the structure of atoms.
Who is the father of the modern periodic table in chemistry?
Henry Moseley is father of modern periodic table. He arranged elements in order of increasing atomic number. He arranged elements such that the elements with same properties were grouped together.
What did Henry Moseley change about the periodic table?
Henry Moseley reorganized the periodic table based on atomic number instead of atomic mass, thereby providing a more accurate and clear arrangement of elements. This reorganization helped to explain the discrepancies and predict properties of certain elements that were not well-understood before.
How did Henry mosely rearrange the periodic table and why?
Before Henry Moseley, the periodic table was arranged in order of increasing atomic mass. However, this arrangement did not allow all the elements to be placed into groups of similar chemical properties. Moseley rearranged the periodic periodic in order of increasing atomic number which did have all the elements in their correct groups.
Who gave the modern periodic table so?
The modern periodic table was created by Dmitri Mendeleev in 1869. He arranged the elements based on increasing atomic mass and similar chemical properties. Mendeleev's table provided a framework for organizing the known elements and predicting the properties of undiscovered elements.
What does a modern periodic table have?
Modern periodic table comprises of elements arranged in order of increasing atomic number. It was created by Henry Moseley.
Who contributed ideas to the modern day periodic table?
Henry moseley
What scientist discovered and added the actinides to the modern periodic tables?
glenn seaborg
Who fixed the periodic table?
Henry Moseley fixed modern periodic table.The elements are arranged in order of increasing atomic number.
Who orgainized the modern Periodic Table?
The Russian. chemist Dimitri Mendeleev in 1869.
Modern periodic table is invented by?
The modern periodic table was invented by Dmitri Mendeleev in 1869. Mendeleev organized the elements by increasing atomic mass and grouped them based on similar chemical properties, which laid the foundation for the periodic table we use today.
Who created or founded the periodic table?
Henry Moseley founded modern periodic table. He proved that atomic number is the fundamental property to arrange the elements.
Who among people that is responsible for the development of periodic table?
Dobereiner, Newland , Mendeleev are responsible for development. Modern periodic table was created by Henry Moseley.
Who prepared the modern periodic table?
I am thinking either Dimitri Mendeleev or Henry Mosely
How did Henry Ford contribute to American Industry?
He perfected the modern assembly line method of production.
What is the correct chronological order of scientists contributing to the modern periodic table?
Dmitri Mendeleev was the first to develop the modern periodic table in 1869. Later, Henry Moseley rearranged the elements by atomic number, which is the modern arrangement. So, Mendeleev comes before Moseley in terms of their contributions to the modern periodic table.
Where the periodic table was discovered?
The periodic table was first proposed by a Russian chemist Dimitri Mendeleev. The modern periodic table ordered by atomic number was proposed by an English physicist, Henry Moseley.
