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Definition
| Completed a list of all the known elements known in the 1700s |
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Definition
| Proposed an arrangement where the elements were organized by increasing atomic mass |
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Definition
| When the elements were arranged by increasing atomic mass their properties repeated every 8th elemnt |
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Definition
| Demonstrated a connection between atomic mass and elemental properties |
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Definition
| Rearranged the table by increasing atomic number and resulted in a clear periodic pattern |
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Definition
| Periodic repatition of chemical and physical properties of the elements when that are arranged by increasing atomic number |
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| elements in groups 1,2 and 13-18 possess a wide variety of chemical and physical properties |
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| Transition metals Description 1 |
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Definition
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Definition
| generally shiny when smooth and clean; solids at room temperature and good conductors of heat and electricity |
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| Alkali Metals: Description 1 |
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Definition
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| Group 2 not as reactive as group 1 but still very reactive |
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| Transition elements are divided into |
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Definition
| Transition metals and inner transition metals |
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| The inner transition metals are also called |
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Definition
| The lanthanide and actinide series |
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| Non Metals: Description 1 |
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Definition
| generally elements that are gases or brittle, dull look solids, and poor conductors of heat and electricity |
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| physical and chemical properties of both metals and nonmetals, such as silicon and germanium |
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Term
| Alkali metals: description 2 |
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Definition
| Are not found in nature as free elements silver in appearance soft low melting points |
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Term
| Alkaline earth metals: Description 2 |
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Definition
are not found in free nature
are more reactive as you go down the group
harder, more dense then alkali metals
higher melting points then alkali metais |
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Term
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Definition
Most reactive nonmetals
forms salts with metals
less reactive as you go down |
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Term
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Definition
Outer electrons are all 8
not reactive (inert)
Colorless, odorless |
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Term
| Transition elements groups 3-12 |
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Definition
all metals
good conductors
high luster
hadrer and mroe dense then S block metals
Higher mealting points than s block metals
less reactive than S block metals
Many commonly found in nature as free element
do not easily form compounds |
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