Question

the three dimensional structure of molecules is a consequence of the arrangement of ______ about the central atom.
neutrons
photons
electrons
protons

question 2
1 pts
electrons occupying the highest principal energy level of an atom in its ground state are known as ______ electrons.
orbitng
crowning
valence
hyper

Explanation:

1. The three - dimensional structure of molecules is determined by the electron - pair repulsions around the central atom. Neutrons and protons are in the nucleus and do not directly affect the molecular shape. Photons are related to electromagnetic radiation and not to molecular structure. So electrons are the key factor for molecular geometry.
2. Valence electrons are the electrons in the outermost shell (highest principal energy level) of an atom in its ground state. They are involved in chemical bonding and chemical reactions. Orbiting is a general term for electron motion, crowning and hyper are not relevant terms for these electrons.

Answer:

1. C. electrons
2. C. valence