Which is the correct equation for the formation of calcium fluoride?

Question

Match the monoatomic cations and anions with their names.

Match Term Definition

barium A) Ba2

bromide B) H-1

beryllium C) Be2

iodide D) I-1

hydride E) Br-1

Which is the correct equation for the formation of calcium fluoride?

Ca2 F2-= CaF

Ca2 F1-=CaF

Ca1 F2- = Ca2F

2Ca1 F2- = Caf

Answer 1

calcium fluoride.  

From the elements:

Ca(s) + F2(g) --> CaF2(s)

or

From the ions:

Ca2+  +  2F-  -->  CaF2(s)

None of your choices are correct.

Barium  ion is Ba^2+

Bromide ion is Br^-

Beryllium ion is Be^2+

Iodide ion is I^-

Hydride ion is H^-