2. florine is a toxic, reactive gas. which representation (structural formula, electron dot structure, or three-dimensional model) would you use to explain why fluorine so reactive? why ?

Use the electron dot structure to show that Fluorine has an electronic configuration of (2,7).
It only requires one more electron to obtain the stable electronic configuration of a noble gas, which is an octet electronic configuration. Hence, it reacts readily with other elements. 

The angle of reflection is 30°