DIRECTIONS: Use the Word Bank to answer the questions below. For questions 2 and 3 circle the correct choice.

1. Electrons surround the nucleus in defined regions called .
2. The shells further away from the nucleus are larger/smaller and can hold more/less electrons.
3. The shells closer to the nucleus are larger/smaller and can hold more/less electrons.
4. The shell (closest to the nucleus) can hold a maximum of electrons.
5. Once the first shell is full, the shell begins to fill. It can hold a maximum of electrons.
6. Once the second shell is full, the shell begins to fill.
7. Once the third shell contains electrons, the shell begins to fill.
8. The arrangement of electrons in shells around the nucleus is referred to as an atom's .