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the symbol p represents the element phorphorus. this elements atomic number is 15. how many protrons and electrons are in a p-3 ion?

Respuesta :

Phosphorus is element number 15, so the P atom has 15 protons and 15 electrons 
for a total of +15 + -15 = 0 charge 

P-3 has a charge of -3 because it has attracted 3 electrons off a less electronegative atom. 

Now, the P atom has 15 protons (+15) and 18 electrons (-18) which = -3 net charge on the P-3 ion. 


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