<p> Orbitals in Energy Levels 1-4 (Dr. Amah) ______Shell Orbitals Maximum Shell Number Capacity Of Electrons ______</p><p>1 1s 2 2</p><p>2 2s 2 8</p><p>2p, 2p, 2p 6</p><p>3 3s 2 18</p><p>3p, 3p, 3p 6 3d, 3d, 3d, 3d, 3d 10</p><p>4 4s 2 32</p><p>4p, 4p, 4p 6</p><p>4d, 4d, 4d, 4d, 4d 10</p><p>4f,4f, 4f, 4f, 4f, 4f, 4f 14</p><p>Problems 1. Identify the elements that have the following electron shell arrangements: Energy Level: 1 2 3</p><p> a. 2e- 1e- b. 2e- 8e- 2e- c. 1e- d. 2e- 8e- 8e- e. 2e- 8e- 3e-</p><p>2. The elements boron and aluminum are in the same group on the periodic table.</p><p> a. Write the electron arrangement for boron and aluminum</p><p> b. How many electrons are in the outer energy levels for each element?</p><p> c. What is their group number?</p>