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On what were the original atomic weights based?
The original atomic weights were based on the mass of hydrogen.
Why did Mendeleev create the periodic table?
Dmitri Mendeleev created the periodic table to organize and classify the elements based on their properties and atomic weights, allowing for easier understanding and prediction of element behavior.
When was the periodic table created and who by?
The periodic table was created by Dmitri Mendeleev in 1869. He organized the elements based on their chemical properties and their atomic weights, creating a system that arranged the elements into groups and periods. This arrangement allowed for the prediction of missing elements and became the basis for the modern periodic table.
How can one determine the atomic weight of an element?
The atomic weight of an element can be determined by calculating the weighted average of the masses of its isotopes, taking into account their abundance in nature. This information is typically found on the periodic table of elements.
What is Lother Meyer's curve?
a curve plotted by Lother Meyer between atomic mass and atomic volume of different elements is called Lother Meyer's curve. In this curve similar elements were found to occupy similar positions. Lother Meyer concluded the results obtained from the curve as, "atomic volume of elements are periodic functions of their atomic masses". But later on it was modified as atomic volumes of elements, are periodic function of their atomic numbers.
Base weight a system of comparing atomic weights to carbon is it true or false?
True. The unit for the atomic weights of chemical elements is the relative atomic mass unit (1/12 from the atomic mass of the isotope 12C). Note that atomic weights is used for elements and atomic mass for isotopes.
Who was the first scientist to arrange the chemical elements in order of their atomic weights?
Dmitri Mendeleev is credited with arranging the chemical elements in order of their atomic weights. His work led to the development of the periodic table of elements.
The atomic theory was supported by mendeleev when scientist did what?
The atomic theory was supported by Mendeleev when scientists discovered that elements displayed a periodic trend in their properties when arranged by increasing atomic weight. Mendeleev used this information to create the periodic table, organizing elements by their atomic weights and predicting the properties of missing elements.
Who was the first to look at the atomic weights as a baasis for putting the elements in order?
The first scientist to propose arranging the elements based on their atomic weights was John Dalton in the early 19th century. Dalton's work laid the foundation for the periodic classification of elements, though it was Dmitri Mendeleev who later developed the periodic table, organizing elements by both atomic weight and properties. Mendeleev's table, published in 1869, allowed for the prediction of undiscovered elements based on their position in the table.
What did British scientist Henry Moseley determine?
British scientist Henry Moseley determined the concept of atomic number as the basis for the modern periodic table, demonstrating that it is a more fundamental property of an element than its atomic mass. He also used X-ray spectroscopy to accurately determine the atomic numbers of elements, which led to a more organized and predictive arrangement of the elements in the periodic table.
What is the biggest and jump in atomic weights between consecutive elements on the periodic table Give the pair of elements and the difference in their relative atomic weights?
The largest jump in atomic weights between consecutive elements on the periodic table occurs between oxygen (atomic weight ~16.00) and potassium (atomic weight ~39.10), with a difference of approximately 23.10. This significant increase is due to the transition from lighter elements in the second period to heavier elements in the fourth period.
Can you find any cases in the first 90 elements in which consecutive elements do not have increasing atomic weights?
Yes, in the first 90 elements of the periodic table, there are cases where consecutive elements do not have increasing atomic weights. For example, between lithium (Li) with an atomic weight of 6.94 and beryllium (Be) with an atomic weight of 9.01, the atomic weight decreases instead of increasing.
What elements did John Dalton discover the atomic weights of?
John Dalton determined the atomic weights of several elements, including hydrogen, oxygen, carbon, nitrogen, and sulfur, among others. He used hydrogen as the reference point with an atomic weight of 1, assigning relative weights to other elements based on their combinations with hydrogen. Dalton's work laid the foundation for the modern understanding of atomic theory and the relative weights of elements. His findings were crucial in advancing the field of chemistry in the early 19th century.
What is the sum of atomic mass?
I suppose that you think to atomic weights (not mass) of chemical elements and the molecular mass.
How are chemicals related to atomic mass?
The molar mass of a compound is the sum of atomic weights of the contained elements in the molecule.The expression atomic weight is correct for elements; for isotopes is correct atomic mass.
What tells you how heavy elements atoms are compared with atoms of other elements?
the atomic weights on the Periodic Table
What tells you how heavy an elements atoms are compared with atoms of other elements?
the atomic weights on the periodic table
