Essential Question: How are the elements organized? THE PERIODIC TABLE.
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Transcript of Essential Question: How are the elements organized? THE PERIODIC TABLE.
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EssentialQuestion:
How are the elements organized?
THE PERIODIC TABLE
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Dmitri Mendeleyev AlkaliPeriodic Table Alkaline
earthPeriod TransitionGroup/Family HalogensNoble gasesMetalsNonmetalsMetalloids
VOCABULARY
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Families of the Periodic Table
CONCEPT
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Russian chemist who first tried to classify elements based on their properties.
His table was ordered by atomic MASS (which has been changed today).
DMITRI MENDELEYEV
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Chart that organizes information about the elements.
Each box contains: Chemical symbol, Atomic Mass, and Atomic Number.
Today is organized by Atomic NUMBER.
PERIODIC TABLE
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Horizontal Rows on the periodic table.
Numbered 1-7.
PERIOD
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Also called: FAMILY
Vertical columns on the periodic table.
Elements in same group/family have similar properties.
GROUP
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Left of step-like line.Shiny luster.Malleable – made into thin sheets.Ductile – stretched into wires.Solid.Conduct heat & electricity.
METALS
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Group 1.Most reactive metals – combine with other elements.
ALKALI METALS
Sodium
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Group 2.Also very reactive elements.
ALKALINE EARTH METALS
Magnesium
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Groups 3-12.Give off characteristic colors.
TRANSITION METALS
TransitionMetals
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Along step-like line.Some characteristics of metals AND nonmetals.
METALLOIDS
Metalloids
Silicon
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Right of step-like line.Dull.Not conductors.Gases or solids.
NONMETALS
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Group 17.Most reactive nonmetals.Halogens + Alkali metals = Salts.
HALOGENS
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Group 18.Least reactive.Inert – do not react naturally.
NOBLE GASES