An electron travels 1.64 m in 4.32 × 10−8 s. how fast is it traveling? answer in units of m/s

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.