Respuesta :
Let's see
Fluorine reacts with Calcium metal to form calcium fluoride
[tex]\\ \rm\rightarrowtail Flourine+Calcium\longrightarrow CaF_2[/tex]
- Write states
[tex]\\ \rm\rightarrowtail Fluorine(g)+Calcium (s)\longrightarrow Calcium\: Fluoride (s)[/tex]