Question

note: to answer some of the questions, it may help to reference a periodic table.
what is the term for the three - dimensional structure of the nuclei of atoms in a molecule or polyatomic ion?
bond length
molecular geometry
molecular formula
lewis structure

Explanation:

• Bond length: It is the distance between the nuclei of two bonded atoms. It is a one - dimensional measurement and not related to the three - dimensional structure of nuclei in a molecule or polyatomic ion.
• Molecular geometry: This is the three - dimensional arrangement of the nuclei of atoms in a molecule or polyatomic ion. It takes into account the positions of all the atoms relative to each other in space.
• Molecular formula: It gives the number of each type of atom in a molecule. For example, \(H_2O\) is the molecular formula for water. It does not describe the three - dimensional structure.
• Lewis structure: It shows the bonding between atoms in a molecule and the lone pairs of electrons. While it is a useful tool for understanding bonding, it is a two - dimensional representation and not the three - dimensional structure of the nuclei.

Answer:

molecular geometry