created by tara l. moore, mgccc the periodic table to continue, left click your mouse
TRANSCRIPT
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THE PERIODIC TABLE
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DIRECTIONS
• This presentation is designed to be used like flash cards.
• To check your answer and/or to move to the next slide, left click your mouse.
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ALKALI METALS
• Group IA (alkaline means basic)– Li– Na– K– Rb– Cs– Fr
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ALKALINE EARTH METALS
• Group IIA– Be– Mg– Ca– Sr– Ba– Ra
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HALOGENS
• Group VIIA (nonmetals, halogens means salt formers)– F– Cl– Br– I
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NOBLE GASES
• Group VIII (nonmetals- rare gases)– He– Ne– Ar– Kr– Xe– Rn
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Group or Families of the Periodic Table
• VERTICAL COLUMNS- elements in a group have similar chemical and physical properties
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Periods in a Periodic Table
• HORIZONTAL ROWS- elements in periods have properties that change progressively across the table
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Physical Properties of Metals
• High electrical conductivity that decreases with increasing temperature.
• High thermal conductivity.• Metallic gray or silver luster• Almost all are solids• Malleable (can be hammered into sheets,
etc.)• Ductile (can be drawn into wires)
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Physical Properties of Nonmetals
• Poor electrical conductivity (except carbon in the form of graphite)
• Good heat insulators (except carbon in the form of diamonds)
• No metallic luster• Solids, liquids or gases• Brittle in solid state• Non-ductile
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Chemical Properties of Metals
• Outer shells contain few electrons (usually 3 or fewer)
• Forms cations (positive ions) by losing electrons
• Form ionic compounds with nonmetals
• Solid state characterized by metallic bonding
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Chemical Properties of Nonmetals
• Outer shells contain four or more electrons• Form anions (negative ions) by gaining
electrons• Form ionic compounds with metals and
molecular (covalent) compounds with other nonmetals.
• Covalently bonded molecules; Noble gases are monatomic
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TRENDS IN THE PERODIC TABLE
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ATOMIC NUMBER
• ACROSS PERIOD: INCREASES
• DOWN GROUP: INCREASES
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ATOMIC MASS
• ACROSS PERIOD: INCREASE
• DOWN GROUP: INCREASE
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ATOMIC RADIUS
• ACROSS PERIOD: DECREASE
• DOWN GROUP: INCREAS
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ATOMIC VOLUME
• ACROSS PERIOD: DECREASE
• DOWN GROUP: INCREASE
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ATOMIC DENSITY
• ACROSS PERIOD: INCREASE
• DOWN GROUP: INCREASE
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ELECTRONEGATIVITY
• ACROSS PERIOD: INCREASE
• DOWN GROUP: DECREASE
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ELECTROPOSITIVITY
• ACROSS PERIOD: DECREASE
• DOWN GROUP: INCREASE
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IONIZATION ENERGY
• ACROSS PERIOD: INCREASE
• DOWN GROUP: DECREASE
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COLOR
• ACROSS PERIOD: NO TREND
• DOWN GROUP: DARKER
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METALS
• ACROSS PERIOD: LESS METALLIC
• DOWN GROUP: MORE METALLIC
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NON-METALS
• ACROSS PERIOD: MORE METALLIC
• DOWN GROUP: LESS METALLIC
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METALLOID
• BORDER ZIG-ZAG LINE
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NUMBER OF SHELLS
• ACROSS PERIOD: CONSTANT
• DOWN GROUP: INCREASE
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NUMBER OF ELECTRONS IN OUTER SHELL
• ACROSS PERIOD: INCREASES
• DOWN GROUP: CONSTANT
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ELECTRON AFFINITY
• ACROSS PERIOD: INCREASE
• DOWN GROUP: CONSTANT
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IONIC RADIUS
• DOWN GROUP: INCREASE
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ANIONS (-)
• LARGER THAN ATOM
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CATIONS (+)
• SMALLER THAN ATOM
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REACTIVITY OF METALS
• ACROSS PERIOD: DECREASES
• DOWN GROUP: INCREASES
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REACTIVITY OF NON-METALS
• ACROSS PERIOD: INCREASES
• DOWN GROUP: DECREASE