Question

what is a region in an atom where there is a high probability electrons.
in the center of the atom
outer shell of the atom(outside of the electron)
compound
valence electrons

what is an electron in the outermost energy level of an atom
particle
molecule
compound
valence electrons

Explanation:

For the first question:

• The center of the atom is the nucleus which contains protons and neutrons, not a region of high electron probability.
• A compound is a substance formed from two or more elements chemically bonded.
• Valence electrons are a type of electrons (outer - shell electrons), but the question is about a region.
• The outer shell (electron shell) of an atom is the region where there is a high probability of finding electrons.

For the second question:

• A particle is a very general term (e.g., sub - atomic particles like protons, neutrons, electrons; or larger particles).
• A molecule is made up of two or more atoms.
• A compound is a substance with two or more elements chemically combined.
• Valence electrons are specifically the electrons in the outermost energy level of an atom.

Answer:

First question: Outer Shell of the atom(inside of the electron)
Second question: Valence Electrons