Question

b. describing where each of the three subatomic particles are located.
i. electrons:
ii. neutrons:
iii. protons:
c. explain where the mass and volume in an atom mainly exist.
i.

Explanation:

• Part b:
• Electrons are located in the electron - cloud (or electron shells) around the nucleus of an atom.
• Neutrons are located within the nucleus of an atom.
• Protons are located within the nucleus of an atom.
• Part c:
• Mass in an atom mainly exists in the nucleus. This is because protons and neutrons, which are located in the nucleus, have significant mass compared to electrons (the mass of an electron is about \(1/1836\) of the mass of a proton or neutron).
• Volume in an atom mainly exists in the electron - cloud. The nucleus is extremely small compared to the overall size of the atom. For example, if an atom were the size of a large stadium, the nucleus would be about the size of a pea. The electrons occupy the vast majority of the space (volume) around the nucleus.

Answer:

• b.i : In the electron - cloud (or electron shells) around the nucleus.
• b.ii : In the nucleus.
• b.iii : In the nucleus.
• c.i : Mass mainly exists in the nucleus (due to protons and neutrons having most of the mass). Volume mainly exists in the electron - cloud (as the nucleus is very small compared to the overall atomic size).