Explanation:
Part I: Modeling Atoms
1) On the chart, amu is defined as Atomic Mass Units. Where is the mass of an atom found, in the nucleus or in the electron cloud?
Nucleus
2) Look at the diagrams to determine what contributes the most to the volume of an atom, the nucleus or the electron cloud?
The nucleus
3) Since protons (p+) with a positive charge and neutrons (no) without a charge are located in the nucleus, what is the overall charge of the nucleus portion of an atom: positive, negative, or no charge at all?
Positive
4) What is the overall charge of the electron cloud portion of the atom?
The number of electrons, negative because electrons have negative charge
5) Explain why the attraction between positive and negative charges holds the atoms together using the following words: "overall charge of the nucleus" and "charge of the electron cloud."
6) What similarities do you see when comparing the hydrogen atom diagram to the helium atom diagram?
Both have a nucleus, and an electron cloud, both have at least one proton and at least one electron.
7) Compare the numbers of each subatomic particle found in both diagrams and then list what makes hydrogen different from helium.
