Graduation Diploma is valid for only one (1) year in order to take the FDNY computer based. exam (Z-50). Candidates who fail the final examination on the second attempt shall be required to re-. attend the course in its entirety.
Quantum dots (QD) are very small semiconductor particles, only several nanometres in size, so small that their optical and electronic properties differ from those of larger particles. They are a central theme in nanotechnology.
Lewis Dot Structure for Compounds. Lewis dot structures, as you have learned, are a way to diagram an element and easily show its valence electrons. A Lewis dot structure is a diagram that shows the valence electrons in an element. In a Lewis dot structure, the nucleus of the element is represented by its symbol.