[ 561 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Examine the diagram of an atom shown here. Nucleus Contains protons and neutrons 1st Energy Level Can hold maximum of two electrons in one orbital 2nd Energy Level Can hold a maximum of eight electrons total distributed over four different orbitals 3rd Energy Level Can hold a maximum of 18 electrons distributed over nine different orbitals Which of these would be found in the first energy level? A. eight neutrons B. 18 electrons C. protons and neutrons D. no more than two electrons