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A maximum of 110. But for any given element, each energy level is not necessarily filled completely before moving on to the next one, so you have to look up the electron configuration for each one to be sure how many electrons it has in each of its shells.

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How many energy shells does silver have?

Lead has six energy levels. It has an atomic number of 82 which is also equivalent to the number of protons and electrons.


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Describe the arrangement within energy levels of the seven electrons of an atom of nitrogen?

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