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The symbol P represents the element phosphorus. This element’s atomic number is 15. How many protons and electrons are in a P–3 ion?

Respuesta :

  protons = 15
              electrons = 18

P gains 3 electrons to form P-3 ion to attain noble gas configuration 2,8,8
+15 + -15 = 0 charge

(+15) and 18 electrons (-18) which = -3 net charge on the P-3 ion.

Hope this helps!

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