The charges for four ions are sodium (na) +1, calcium (ca) +2, fluorine (f) –1, and sulfur (s) –2. which would be an ionic bond that could form from any of these ions?
a. naca2
b. na2s
c. caf
d. fs

B.

Explanation: An ionic bond is formed when an element completely transfers its valence electron to another element. Ionic bond is formed between a metal and an non-metal.

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Here is having an oxidation state of +1 and sulfur has an oxidation state of -2. Thus they combine to form neutral .

is having an oxidation state of +2 and fluorine has an oxidation state of -1. Thus they combine to form neutral . and not .

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.