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how many valence electrons does each atom of arsenic have?

Sagot :

rspill6

Answer: 5

Explanation: Arsenic, As, has 5 electrons in the 4th energy shell.  4s^2 and 4p^3.  The electrons being added for the elements scandium through zinc are all going into the 3d orbital, in the 3rd energy shell.  They don't count, since valence electrons are only those in the highest energy level, 4 in this case.

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