If an atom can form more than one cation, the cation with the lowest charge ends with which set of letters?
a. -ic b. -ide c. -ate d. -ous

Answer is A 

Explanation:

Now we know that an atom wants to complete its outer shell while keeping electrons in pairs of two now in A there are four electrons which which can be ejected while in B will want to accept 3 electrons to complete its shell as ejecting five will take lot of energy similar case will be for C,D and E which would want to accept 2,1,0 electrons respectively

b.

the accuracy of the data.