Question

roberto creates an animation titled \flying through an atom.\ the animation makes it seem as if the viewer passes all the way through an atom, starting from one side, then through the atoms center, and then leaving through the other side.
what is the best description of the order of events in the animation?
○ the viewer travels through the electron cloud, then the protons, and then the nucleus.
○ the viewer travels through the nucleus, then the electron cloud, and then the nucleus again.
○ the viewer travels through the electron cloud, then the neutrons, and then the protons.
○ the viewer travels through the electron cloud, then the nucleus, and then the electron cloud again.

Explanation:

To solve this, we recall the structure of an atom: an atom has an electron cloud (electrons) surrounding a nucleus (containing protons and neutrons). So when moving through an atom from one side to the other, the path is: enter the electron cloud (outer part), then the nucleus (center), then exit through the electron cloud on the other side. Let's analyze each option:

• First option: Protons are in the nucleus, and the order is incorrect.
• Second option: The nucleus is in the center, so starting with nucleus is wrong.
• Third option: Neutrons and protons are in the nucleus, and the order is incorrect.
• Fourth option: Matches the atom's structure: electron cloud (entry) → nucleus (center) → electron cloud (exit).

Answer:

D. The viewer travels through the electron cloud, then the nucleus, and then the electron cloud again.