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4 Cards in this Set

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  • Back
What can be used to explain differences as well as similarities in the properties of elements?
Electron Configurations
Periodic Law
Specific patterns related to the organization of the periodic table exist
In 1869, what two chemists published nearly identical classification schemes for the periodic table?
In what way were they both organized?
Dmitri Mendeleev and Lothar Meyer organized their tables according to atomic mass--
*both noted chemical and physical trends that occurred periodically when arranged this way
Who developed the concept of Atomic Numbers in 1913?
How was this concept useful?
Henry Mosely
it clarified some problems that were being caused by arrangement based on atomic weights, which may vary based on number of neutrons (ex. argon z=18 has a greater atomic weight than potassium z=19)