Labels:clock | earth | frisbee | plant | sky | tribute album OCR: ELECTRON SHELLS THE ATOMIC number ofan element Nucleus Second relers he num ber of protons First shell (particles with positive electrical shell charge) in the nucleus (center) of each ofits atoms. This the same the number of electrons outside the nucleus The electrons occur shells. The first shell holds up to two electrons the second up to eight and the third also up to eight The number of shells at atom has depends on how many electrons it has If the outer shell Is full the atom stable. Atoms can become stable by gaining, losing or sharing electrons Shell structure of chlorine A chlorine atom bas 17 electrons. Third two the first shell, eight the shell second, and seven the third. ELECTRON SHELL STRUCTURES refers
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