Which of the following could form an ionic compound? Check all that apply.
Na+ and F-
Ca2+ and Fe3+
Cl- and K+
02- and S2-

c

explanation:

idk

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.