Question

1) Write the symbol and charge for each individual ion

2) Balance the charge so that they equal to zero
3)Write the formula based on how many of each ion you used in step 2


11) Beryllium and Phosphorus
12) cesium and Sulfur
13) Lithium and phosphorus
14) fluorine and rubidium
15) Francium and oxygen

Answer 1

I'm pretty sure these are correct

11) Be 2+ and P 3- Formula is Be3P2

12) Cs 1+ and S 2- Formula: Cs2S

13) Li 1+ and P 3- Formula: Li3P

14) Rb 1+ and F 1- Formula: RbF

15) Fr 1+ and O 2- Formula: Fr2O

Step-by-step explanation:

You do the criss-cross method where the charge on one ion becomes the amount on the second