Matse 201 Exam 1 With Complete Solutions
metals
most elements exist as
metal alloys
a homogenous mixture of two or more elements at least one of which is a metal, and where the resulting material has metallic properties
intermetallic compound
similar to alloy but the mixture exists as...
matse 201 exam 1 with complete solutions metals mo
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Matse 201 Exam 1 With Complete Solutions
metals
most elements exist as
metal alloys
a homogenous mixture of two or more elements at least one of which is a metal, and where the
resulting material has metallic properties
intermetallic compound
similar to alloy but the mixture exists as a stoichiometric compound (distinct atomic ratios)
ceramics
inorganic, non-metallic substances
ceramics
solids formed between metallic and nonmetallic elements, most frequently oxides nitrides and
carbons
oxides, nitrides, carbons
ceramics are typically these kinds of materials
polymers
organic compounds based on carbon and hydrogen
polymers
lightweight, poor conductors, wide range of mechanical properties, poor temperature stability
composite
a mixture of distinct materials to produce properties superior to those of a single material
composites
fiberglass and concrete are examples of
semiconductors
elements and compounds with electrical properties between conductors and insulators
advanced materials
materials engineered for high tech applications
isotopes
elements with same number of protons but different number of neutrons are called
shell, distance from the nucleus
, the principal quantum(n) number defines the _____ or the _______
subshell, shape
the angular quantum number(l) defines the ______ or the _____
2(2l+1)
maximum number of electrons in a subshell equals
m(l)
this defines a specific energy state (orbital) within a subshell
spin
electron pairs in orbitals with same n,l, ml are defined with opposite ______ numbers
pauli exclusion principle
the _______ states that no two electrons can occupy the same state as defined by the 4 QNs
s
these electrons are usually given up first in transition metals
ionic
transfer of electrons is this bond
covalent
sharing of localized electrons is this bond
metallic
sharing of delocalized electrons is this bond
true
true/false there is no directionality associated with ionic bonding
stronger, higher, stiffer, low
in a bond in total bonding force and energy diagrams a steeper slope means that it has a
stronger/weaker bond, lower/higher melting point, stiffer/less stiff material, high/low thermal
expansion
coordination number
number of neighboring atoms immediately surrounding a particular type of atom
non-directional
means that the relative positions and number of nearest neighbors are not determined by the nature
of the bond
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