Why do unstable atoms seek other atoms with which they can share electrons?

• A. To become radioactive
• B. To increase their atomic mass
• C. To achieve a stable electron configuration similar to that of noble gases
• D. To decrease their number of protons

Answer: (C)

Verified step by step guidance

1. Understand that atoms are most stable when their outermost electron shell (valence shell) is full, similar to the electron configuration of noble gases.
2. Recognize that unstable atoms have incomplete valence shells, which makes them reactive and eager to achieve stability.
3. Learn that atoms can achieve a full valence shell by sharing electrons with other atoms, forming covalent bonds.
4. Know that this sharing of electrons allows both atoms involved to effectively 'count' the shared electrons toward their valence shells, leading to a more stable electron configuration.
5. Conclude that unstable atoms seek other atoms to share electrons specifically to reach a stable electron configuration, not to become radioactive, increase atomic mass, or change their number of protons.