Ion Formation and Electron Transfer

What is an ion?

• A neutral particle with an equal number of protons and electrons.

• A charged particle formed when an atom gains or loses electrons.

• A particle that always has a positive charge.

• A particle that always has a negative charge.

Why do atoms gain or lose electrons to form ions?

• To increase their atomic mass.

• To become less reactive.

• To achieve a full outer electron shell.

• To decrease their number of protons.

Which groups of elements on the periodic table are generally most likely to form ions?

• Groups 1, 2, 6, and 7

• Groups 3, 4, and 5

• Only Group 0 (Noble Gases)

• Transition metals

How is the loss of electrons represented in a chemical equation for ion formation?

• Electrons are shown on the left side of the reaction arrow.

• Electrons are shown on the right side of the reaction arrow.

• Electrons are not explicitly shown in the equation.

• Electrons are represented as positive charges.