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Chemistry Paper 1
Metallic Bonding
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harriet hosell
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Cards (48)
What is the main difference between alloys and pure metals?
Alloys contain two or more
elements
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What type of bonding occurs between metal atoms?
Metallic bonding
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What type of bonding occurs between metals and non-metals?
Ionic
bonding
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What type of bonding occurs between non-metals?
Covalent bonding
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What do metal atoms do with their outer shell electrons in metallic bonding?
They give up and
share
them
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What are the electrons called that are free to move about in metallic bonding?
Delocalized electrons
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Why do metal atoms become positive ions in metallic bonding?
They lose
negative electrons
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What type of attraction holds the structure together in metallic bonding?
Electrostatic
attraction
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What are the melting and boiling points of most metallic structures?
High
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Which particles are attracted to each other in metallic bonding?
Positive ions
and
negative electrons
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Why are metals good conductors of electricity and heat?
Delocalized electrons
carry energy
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Why are pure metals able to be bent or hammered easily?
Layers
can slide over one another
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What is the name for the property that metals can be hammered into shapes?
Malleable
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What is the effect of adding different sized atoms to a metal structure to make an alloy?
Disrupts the
regular structure
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Why are alloys harder than pure metals?
Layers
can no longer slide easily
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What are the main elements in steel?
Iron
and
carbon
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Besides iron and carbon, what other elements can be found in steel?
Chromium
,
manganese
, or
vanadium
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In what applications are alloys like steel used due to their strength?
Cars
and
planes
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How do alloys differ from pure metals in terms of their structure and properties?
Structure: Alloys have a
disrupted
, irregular structure due to different sized atoms.
Hardness: Alloys are harder than pure metals.
Sliding Layers
: Layers in alloys cannot slide over one another as easily as in pure metals.
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What topic will be covered regarding the periodic table in this two-part video?
Periodicity
,
bonding
, and structure
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What three types of structures will be looked at?
Giant
metallic
, giant
covalent
,
simple molecular
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What properties have previously been covered regarding periodicity?
Electron configuration
,
atomic radius
, ionization energy
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What trend is observed in the periodic table regarding metals and non-metals?
Metals
on the
left
,
non-metals
on the
right
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What are metalloids also called?
Semi-metals
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What characteristic defines metalloids?
They have properties of both
metals
and
non-metals
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What elements are being focused on from Period 2?
Lithium
and
beryllium
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How many protons does a lithium atom have?
Three
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How many electrons are in lithium's outer shell?
One
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What happens to the outer shell electrons in metals?
They are
delocalized
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What term describes the sharing of electrons in metals?
Delocalization
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What charge do lithium atoms have after donating their outer electron?
One
positive
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What are positively charged metal ions called?
Cations
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What type of attraction occurs between delocalized electrons and positive cations?
Electrostatic attraction
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What is the electrostatic attraction in metals called?
Metallic bonding
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What is the overall structure of a metal referred to as?
Giant
metallic
lattice
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What are the two key features of a giant metallic lattice?
Cations
are fixed in place and cannot move.
Delocalized electrons
are free to move.
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What property of metals does the movement of delocalized electrons explain?
Good
conductors
of electricity
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In what states do metals conduct electricity?
Solid
or
liquid
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What pole are delocalized electrons attracted towards?
Positive pole
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What role do delocalized electrons play in electrical conductivity?
Mobile charge carriers
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