Question

1. atoms form bonds in order to

□ have electrons transferred between them
□ have a large difference in electronegativity
□ have the same electronegativities
□ attain a full valence shell

Explanation:

• "have electrons transferred between them": Electron transfer is a part of some bonding (like ionic), but it's a mechanism, not the main reason for bonding. Atoms bond to achieve stability, not just to transfer electrons.
• "have a large difference in electronegativity": Electronegativity difference is related to the type of bond (ionic), but it's not the purpose of bonding. The purpose is stability via full valence shell.
• "have the same electronegativities": Same electronegativity leads to covalent (non - polar) bonds, but again, it's about the type, not the reason for bonding. The core reason is to get a full valence shell (like noble gases, which are stable with full valence shells).
• "attain a full valence shell": Atoms tend to gain, lose, or share electrons to achieve a full valence shell (usually 8 electrons, octet rule, or 2 for hydrogen), which gives them stability, and this is the main reason for forming bonds.

Answer:

D. attain a full valence shell