Atoms form ions by gaining or losing valence electrons to reach a more stable electron configuration with a full valence shell. The electron configuration of the ion is similar to the nearest noble gas to the atom. Identify the charge when aluminum becomes an ion.

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.