Mats quiz #2

Question 1

Is the following statement true or false? In the NaCl crystal, the smaller atoms (ions) sit in interstitial locations in the unit cell

Answer 1

TRUE

Question 2

Is the following statement true or false? In the NaCl crystal, the larger atom (ions) sit in the interstitial locations in the unit cell

Answer 2

FALSE

Question 3

Is the following statement true or false? In the AX ceramic crystal, the “A” and “X” atoms are usually of the same size

Answer 3

FALSE

Question 4

Is the following statement true or false? In the ceramic crystal, there are only ionic bonds

Answer 4

FALSE

Question 5

Is the following statement true or false? The FCC crystal structure is stacked by close-packed layers of atoms

Answer 5

TRUE

Question 6

Is the following statement true or false? The atom packing factor of the FCC crystal is smaller than that of the BCC crystal

Answer 6

FALSE

Question 7

Is the following statement true or false? The close packed direction in the FCC unit cell runs diagonally across the face of the cell

Answer 7

TRUE

Question 8

Is the following statement true or false? There are 4 atoms in FCC unit cells and 6 atoms in HCP unit cells for metals

Answer 8

TRUE

Question 9

Is the following statement true or false? The molecules with double and triple bonds are somewhat stable

Answer 9

FALSE

Question 10

Is the following statement true or false? The chains in a polymer are always of the same length

Answer 10

FALSE

Question 11

Is the following statement true or false? Compared to the linear polymer, the network polymer has increased strength

Answer 11

TRUE