Formation of ions

What is an ion?

• A neutral particle

• A charged particle

• A particle with no electrons

• A particle with a full inner shell

How do ions form?

• Ions are created through nuclear fusion processes.
• Ions form by combining with other ions.
• Ions develop when atoms split into smaller particles.
• Ions form when atoms gain or lose electrons.

Atoms gain or lose electrons to form ions in order to have a ____________, so that they can be stable.

The atoms who only need to gain or lose ____________ electrons are much more likely to form ions, because they require less energy.

Elements in which group of the periodic table are most likely to form positive ions by losing a single electron?

• Group 2

• Group 7

• Group 1

• Group 6

Atoms in group 2 usually lose 2 electrons to become ____________.

What is the charge of ions formd by group 7 atoms by gaining one electron?

• 0
• -1
• +1
• -2

What is the charge of ions formd by group 6 atoms by gaining two electron?

• +1
• -2
• 0
• +2

When an atom loses electrons to become a positive ion, where are the lost electrons typically shown in the chemical equation?

• On the left side of the reaction arrow

• On the right side of the reaction arrow

• Below the atom's symbol

• Above the atom's symbol