1- Unknown material has atomic packing factor 0.149 and atomic radius 0.115 nm. If the theoretical density of this material is 4.94 g/cm3, what material is this? Group of answer choices

Si

Bi

I

Ge

Ca

Not enough information to solve this problem.

2-

[001] is a close or most densely packed _____ for a _____ structure.

Group of answer choices

plane, simple cubic

plane, FCC

plane, BCC

direction, BCC

direction, FCC

direction, simple cubic