MTL 200 EXAM QUESTIONS WITH 100%
CORRECT ANSWERS LATEST VERSION
2025/2026.
What are ceramics? - ANS Ceramics are elements composed of at least two elements, often
more, with complex crystal structures that range from purely ionic to totally covalent.
Anisotropy - ANS directionality of properties
What influences the crystal structure of ceramics? - ANS The electrical charge of ions and the
relative sizes of the anion and cation.
Why must a ceramic molecule be neutral? - ANS The net charge across the cation and anion
must be 0, and the whole ceramic molecule must be neutral.
What do cations and anions prefer in terms of nearest neighbors? - ANS Cations prefer to
have as many nearest neighbor anions as possible, and anions prefer to have as many cations as
possible.
What are the most common coordination numbers in ceramics? - ANS The most common
coordination numbers in ceramics are 4, 6, and 8
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What happens when the ratio of the radii is greater than 1? - ANS The coordination number
is 12.
What are the 3 types of ceramic crystal structures? - ANS AX, AmXp, and AmBnXp Type
What are the 3 subdivisions of AX- Type ceramic structure? - ANS 1. Rock salt structure (NaCl)
2. Cesium Chloride Structure (CsCl)
3. Zinc Blende Structutre (ZnS)
What is the main relationship between the unit cell and rock salt structure (NaCl) and its
coordination number? - ANS The main relationship is 2(r_c + r_a) = a
Its coordination number is 6.
How many anions and cations do you have in a Rock Salt Structure? - ANS 4 anions and 4
cations.
What is the main relationship between the unit cell and cesium chloride structure (CsCl)and its
coordination number? - ANS 2(r_c + r_a) = √3 × a
Its coordination number is 8
What is the main relationship between the unit cell and zinc blende structure (ZnS) and its
coordination number? - ANS The main relationship is 4(r_c + r_a) = √3 a.
Its coordination number is 4.
What is the equation for the volume of a sphere? - ANS V=4/3 πr3
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
CORRECT ANSWERS LATEST VERSION
2025/2026.
What are ceramics? - ANS Ceramics are elements composed of at least two elements, often
more, with complex crystal structures that range from purely ionic to totally covalent.
Anisotropy - ANS directionality of properties
What influences the crystal structure of ceramics? - ANS The electrical charge of ions and the
relative sizes of the anion and cation.
Why must a ceramic molecule be neutral? - ANS The net charge across the cation and anion
must be 0, and the whole ceramic molecule must be neutral.
What do cations and anions prefer in terms of nearest neighbors? - ANS Cations prefer to
have as many nearest neighbor anions as possible, and anions prefer to have as many cations as
possible.
What are the most common coordination numbers in ceramics? - ANS The most common
coordination numbers in ceramics are 4, 6, and 8
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What happens when the ratio of the radii is greater than 1? - ANS The coordination number
is 12.
What are the 3 types of ceramic crystal structures? - ANS AX, AmXp, and AmBnXp Type
What are the 3 subdivisions of AX- Type ceramic structure? - ANS 1. Rock salt structure (NaCl)
2. Cesium Chloride Structure (CsCl)
3. Zinc Blende Structutre (ZnS)
What is the main relationship between the unit cell and rock salt structure (NaCl) and its
coordination number? - ANS The main relationship is 2(r_c + r_a) = a
Its coordination number is 6.
How many anions and cations do you have in a Rock Salt Structure? - ANS 4 anions and 4
cations.
What is the main relationship between the unit cell and cesium chloride structure (CsCl)and its
coordination number? - ANS 2(r_c + r_a) = √3 × a
Its coordination number is 8
What is the main relationship between the unit cell and zinc blende structure (ZnS) and its
coordination number? - ANS The main relationship is 4(r_c + r_a) = √3 a.
Its coordination number is 4.
What is the equation for the volume of a sphere? - ANS V=4/3 πr3
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
