anonymous
  • anonymous
hh
Chemistry
jamiebookeater
  • jamiebookeater
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nincompoop
  • nincompoop
I don't know what you're trying to do.
anonymous
  • anonymous
@nincompoop the Element Ir = e + what?
nincompoop
  • nincompoop
could you elaborate what your question is asking? how many electrons does element Iridium have? well in nature, elements are neutral, this means that the number of protons and electrons are equal. look at your periodic table and see how many protons it has, then use that as a reference to indicate how many electrons.

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anonymous
  • anonymous
As shown on the periodic table, it looks like 192 Ir 77 Now what makes that result if one electron is added @nincompoop
nincompoop
  • nincompoop
Iridium has 77 protons therefore it has 77 electrons the amu is 192 atomic weight = protons + neutrons the + charge indicates that one electron is removed this is why there's more protons (+) than electrons (-). if 1 electron is removed then you would have: \[_{77}^{192}Ir^+=76e^-\]
nincompoop
  • nincompoop
now if it were: \[_{77}^{192} Ir^-=78e^-\]
nincompoop
  • nincompoop
do you understand @chemcalc ?
anonymous
  • anonymous
yes @nincompoop
nincompoop
  • nincompoop
let me test what you've learned. how many electrons does an iridium have when: \[_{77}^{192}Ir^{+2}\] and when: \[_{77}^{192}Ir^{-4}\]
anonymous
  • anonymous
75e 81e @nincompoop
nincompoop
  • nincompoop
super! learn something more: ISOELECTRIC this means that Iridium is now isoelectric (the same number of electrons/configuration) as Rhenium (Re) when its electron is 75, and isoelectric as Thallium (Tl) when its electron is 81.
anonymous
  • anonymous
Wow, thank you ! @nincompoop

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