Question

hh

Answer 1

I don't know what you're trying to do.

Answer 2

@nincompoop the Element Ir = e + what?

Answer 3

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.

Answer 4

As shown on the periodic table, it looks like
192 Ir
77

Now what makes that result if one electron is added
@nincompoop

Answer 5

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:
\[_{77}^{192}Ir^+=76e^-\]

Answer 6

now if it were:
\[_{77}^{192} Ir^-=78e^-\]

Answer 7

do you understand @chemcalc ?

Answer 8

yes @nincompoop

Answer 9

let me test what you've learned.

how many electrons does an iridium have when:
\[_{77}^{192}Ir^{+2}\]
and when:
\[_{77}^{192}Ir^{-4}\]

Answer 10

75e


81e

@nincompoop

Answer 11

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.

Answer 12

Wow, thank you ! @nincompoop