GLY 3202 C - Module 3 Quiz Questions And Answers Already Graded A+
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GLY 3202 C
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GLY 3202 C
a cation is bonded with 8 anions. what is the shape of the volume enclosed by the
surrounding anions (coordination polyhedron)? - ️️cube
what are crystallographic axes? - ️️Three of four lines parallel to the major lattice
planes whose origin lies in the center of the crystal.
what are ...
GLY 3202 C - Module 3 Quiz
a cation is bonded with 8 anions. what is the shape of the volume enclosed by the
surrounding anions (coordination polyhedron)? - ✔️✔️cube
what are crystallographic axes? - ✔️✔️Three of four lines parallel to the major lattice
planes whose origin lies in the center of the crystal.
what are the building blocks of minerals? - ✔️✔️ions
what is a cation? - ✔️✔️an atom that has lost at least one electron.
this is a ball and stick representation of a silica tetrahedron. which ion represents O?
A (red ball on top of the central cation)
B (white ball in the center) - ✔️✔️A
which of these statements accurately describes the properties of the ionic radius? -
✔️✔️the ionic radius varies with charge and coordination
how would you describe the relationship between anions and cations in silicates? -
✔️✔️ionic radius of anions is usually bigger than cations.
given the radius of Al as 0.53 and O as 1.26 what coordination polyhedron would you
predict using the following table?
divide 0.53/1.26 = radius ratio range 0.414-0.732 - ✔️✔️octahedron
what is the electrostatic valence bond strength for AL +3 in 6-fold coordination with O2-
- ✔️✔️0.5
which bond will be the hardest to break? (ca2+,si4+,al3+,o2-) - ✔️✔️Si-O in 4-fold
coordination
how are mineral formulae constructed? - ✔️✔️in order of decreasing coordination
number
how many Ca ions are required to balance the mineral formula:
CaxMg4Al(AlSi7)O22(OH)2?
valence states: Ca 2+, Mg 2+, Al 3+, Si4+, O2-, H+ - ✔️✔️2
, what are the two basic parameters that determine ease of substitution of cations in an
atomic structure? (Select 2)
complete solid solution is limited to certain temperatures and pressures in feldspars
where Na is substituting for K. why is this solid solution restricted? - ✔️✔️Because K is
a different size to Na
which of these mineral formulae contain coupled substitutions. Fe is 2+ unless specified
otherwise. (select all that apply)
which one of the following is electrically neutral? - ✔️✔️atom
given that potassium has an atomic no.19 and 4 electron shells with the following
configuration for the first 3 shells:
shell 1: 2
shell 2: 8
shell 3: 8
what charge does K have when it bonds with other elements? - ✔️✔️1+
which type of bonding involves sharing electrons between individual atoms? -
✔️✔️covalent
which type of bonding does not involve the sharing or exchange of electrons? -
✔️✔️van der waals
why do atoms bond? - ✔️✔️because they are most stable when they achieve a full
outer shell of electrons.
in which mineral do van der waals forces (bonds) form an important part of the crystal
structure? - ✔️✔️muscovite mica
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