A Behr model for Rubidium would have how many shells/rings? A 5 6

The correct answer is **A. 5**.Rubidium (Rb) has an atomic number of 37. This means it has 37 electrons. The electron shells fill up as follows:* **Shell 1:** 2 electrons* **Shell 2:** 8 electrons* **Shell 3:** 18 electrons* **Shell 4:** 8 electrons* **Shell 5:** 1 electronTherefore, a Bohr model of Rubidium would show 5 shells or rings.