- The statement "A wave is formed by the vibration of the source spreading around from the source" is irrelevant

- An atom is a kind of object
- Losing / gaining electrons causes the electrical charge of an object to be unbalanced
- So, losing or gaining electrons causes the electrical charge of an atom to be unbalanced

Therefore, losing or gaining electrons causes the electrical charge of an atom to be unbalanced
Question
When an atom loses or gains an electron, it changes

Context
- An atom is a kind of object 
- Losing / gaining electrons causes the electrical charge of an object to be unbalanced
- A wave is formed by the vibration of the source spreading around from the source