periodic table vocabulary
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Periodic Table Vocabulary. 2012-13. Periodic Trend. a predictable pattern of gradual change of certain properties of elements to increase or decrease as one progresses across a row or down a column. groups/families. vertical columns on the periodic table - PowerPoint PPT PresentationTRANSCRIPT
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Periodic TablePeriodic TableVocabularyVocabulary
Periodic TablePeriodic TableVocabularyVocabulary
2012-132012-132012-132012-13
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Periodic TrendPeriodic TrendPeriodic TrendPeriodic Trend
a predictable pattern of gradual change of certain properties of elements to increase or decrease as one progresses across a row or down a column
a predictable pattern of gradual change of certain properties of elements to increase or decrease as one progresses across a row or down a column
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groups/familiesgroups/familiesgroups/familiesgroups/families
vertical columns on the periodic table
have similar properties; “like brothers and sisters”
18 groups
vertical columns on the periodic table
have similar properties; “like brothers and sisters”
18 groups
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PeriodsPeriodsPeriodsPeriods
Horizontal rows on periodic table
properties change gradually, but predictably as you go across the row
“like cousins”
7 periods
Horizontal rows on periodic table
properties change gradually, but predictably as you go across the row
“like cousins”
7 periods
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Atomic numberAtomic numberAtomic numberAtomic number
the number of protons in the nucleus of an atom
the number of protons in the nucleus of an atom
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Valence ElectronsValence ElectronsValence ElectronsValence Electrons
the electrons on the outermost energy level (shell, orbital)
determines reactivity
the closer to a full shell, the less reactive
the electrons on the outermost energy level (shell, orbital)
determines reactivity
the closer to a full shell, the less reactive
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ReactivityReactivityReactivityReactivity
the tendency for an element or substance to undergo a chemical reaction, either by itself or with another substance
the tendency for an element or substance to undergo a chemical reaction, either by itself or with another substance
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Metals Metals Metals Metals
elements that:
✴ have luster
✴ are good conductors of heat and electricity
✴ are malleable (can be flattened into sheets)
✴ are ductile (can be stretched into wires)
found on the left side of the “staircase” on the periodic table
elements that:
✴ have luster
✴ are good conductors of heat and electricity
✴ are malleable (can be flattened into sheets)
✴ are ductile (can be stretched into wires)
found on the left side of the “staircase” on the periodic table
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Nonmetals Nonmetals Nonmetals Nonmetals
elements that:
✴ are usually gases or brittle solids
✴ are poor conductors of heat and electricity
found on the right side of the “staircase” on the periodic table
elements that:
✴ are usually gases or brittle solids
✴ are poor conductors of heat and electricity
found on the right side of the “staircase” on the periodic table
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Metalloids Metalloids Metalloids Metalloids
elements that:
✴ have different properties of both metals and nonmetals
Often semiconductors
sometimes called “semimetals”
found touching the “staircase” on the periodic table
elements that:
✴ have different properties of both metals and nonmetals
Often semiconductors
sometimes called “semimetals”
found touching the “staircase” on the periodic table