Answer:
3. lost electrons.
Step-by-step explanation:
An atom that has lost an electron is positively charged because the number of protons is now greater than the number of electrons in the atom.
- Protons are positively charged particles in an atom.
- Electrons are negatively charged particles.
- Neutrons do not carry any charges.
If the number of protons and electrons are the same, the atom has no charge
If the protons > electrons, the atom becomes positively charged
If electrons > protons, the atom becomes negatively charged.
Atoms becomes charged by losing or gaining electrons.