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4 Cards in this Set
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- Back
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What can be used to explain differences as well as similarities in the properties of elements?
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Electron Configurations
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Periodic Law
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Specific patterns related to the organization of the periodic table exist
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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 |
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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) |
