1 Which statements describe a crystal of salt? Choose all that apply.
Do It is made up of many atoms.
B It is made up of many molecules.
C
its shape is determined by the arrangement of its atoms.
D
E
its size is determined by the arrangement of its atoms.
Its atoms move freely around one another.

E. its size is determined by the arrangement of its atoms. its atoms move freely around one another.

Explanation:

because These salt crystals are made of sodium chloride and their cubic shape is due to a very specific arrangement of the atoms.

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

the answer is c. nacl