pls answer this fast....pls pls
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So number of protons equal atomic number
So number of protons is 35
And mass number equal protons + neutrons
80 = 35 + neutrons
neutrons = 45
Br- means it has one extra electron..
electron = 35 + 1 = 36
So the correct answer is option (4)
Hope it helps
Thanks
Here 4th option is correct