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Franchesca1200
on FreezingBlue Flashcards.
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Founded a method for measuring atomic mass
Stanislao Cannizzarro
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Arranged elements in order of increasing atomic mass
Dmitri Mendeleev
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Observed that properties were arranged periodically
Dmitri Mendeleev
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Was able to predict the existence of elements based on gaps in his table
Dmitri Mendeleev
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Found that elements varied by the number of protons in the nucleus
Moseley
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Arranged elements based on atomic number
Moseley
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States that the physical and chemical properties of the elements are functions of their atomic number
Periodic Law
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A repeating/predictable pattern of properties of atoms as a function of their position on the periodic table
Periodicity
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Periodicity is a result of...
Electron configuration of atoms
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Are alkali metals reactive?
extremely
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Are alkali metals found in nature as free elements?
no
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What do alkali metals produce?
basic solutions when dropped into water
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What are the exceptions to Alkaline Earth Metals?
Hydrogen and Helium
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What metals are reactive, but not as reactive as Alkali?
Alkaline earth metals
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Alkaline Earth Metals aren't found as free elements, but as....
compounds found in nature
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Transition metals are...
good conductors
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What do transition metals form?
colored solutions
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What are the exceptions to transition metals?
- Hg (liquid)
- Pt and Au (non reactive)
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What is included in the p-block?
Metals, metalliods & non-metals
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What are the most reactive non-metals?
Halogens
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What are the least reactive non-metals?
Noble gases
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What are the rare earth elements?
Lanthanide series
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What elements in the F-block are unstable & radioactive?
Actinide series
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