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Morgansinger123
Take a look at this periodic table. You start in the left upper corner (1s) then you go to the right untill you can't go further, then you go 1 row down and start at the left again. So the order will be 1s,2s,2p,3s,3p,4s,3d,4p... etc
joeyrelentless

i believe the answer would be the first option if im not mistaken


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