Question

1. in the space below, draw and label a lithium atom, including the three subatomic particles.

Explanation:

To draw a lithium atom:

1. Nucleus: Lithium has an atomic number of 3, so the nucleus contains 3 protons (positive charge) and 4 neutrons (neutral, mass number = 7 for common isotope \(^7\text{Li}\)). Represent the nucleus as a small circle or cluster.
2. Electron Shells:

• First shell (closest to nucleus) can hold 2 electrons.
• Second shell holds the remaining \(3 - 2 = 1\) electron.
• Draw two concentric circles (or ellipses) around the nucleus. Place 2 electrons on the inner shell and 1 on the outer shell. Label protons (\(p^+\)), neutrons (\(n^0\)), and electrons (\(e^-\)).

Answer:

• Nucleus: Cluster with 3 \(p^+\) and 4 \(n^0\).
• Inner Shell (n=1): 2 \(e^-\).
• Outer Shell (n=2): 1 \(e^-\).

(Visually: Nucleus at center, inner circle with 2 electrons, outer circle with 1 electron, labeled with subatomic particles.)