Question

1. choose the best answer. a(n) __ electron is an electron that occupies the outermost energy level in an atom. valence inner nuclei outer 2) choose the best answer. regions in an atom where you are most likely to find an electron are called __. positions nuclei orbitals ladders 3) choose all that apply. which three postulates are of the bohr model of the atom?

Explanation:

1. Valence electrons are in the outermost energy level of an atom. Inner electrons are in lower - energy levels. Nuclei are the central part of an atom containing protons and neutrons. "Outer" is a general term but not the specific scientific term for outermost - level electrons.
2. Orbitals are the regions in an atom where an electron is most likely to be found. Positions is a non - scientific term in this context. Nuclei are not where electrons are found. Ladders have no relation to electron locations in an atom.
3. (No options provided for this part, but for reference, the Bohr model postulates include electrons moving in fixed orbits, quantization of angular momentum of electrons, and emission/absorption of energy when electrons transition between orbits).

Answer:

1. A. valence
2. C. orbitals
3. (No answer provided as options are missing)