5.4 Ions Have More or Less Electrons

Question 1

Cations

Answer 1

Positive ions formed when an atom loses electrons. The loss of an electron results in one extra proton. If an atom with 2 electrons in its valence shell loses both, it forms a cation.

Question 2

Anions

Answer 2

Negative ions formed when an atom gains electrons. Gain of an electron result in one more electron that protons. If an atom with 7 electrons in its valence shell gains 1 electron, it forms an anion.

Question 3

Atoms

Answer 3

Neutral with equal protons and electrons

Question 4

Ionisation

Answer 4

Occurs when atoms lose or gain electrons and become ions

Question 5

Valence Shell Stability

Answer 5

A full valence shell (8 electrons) is stable and less likely to gain or lose electrons)