monoatomicanion of unitchargecontains45neutrons and36electrons. What is theatomicmas of the elementand inwhichgroup of theperiodictabledoes it lie ?

monoatomicanion of unitchargecontains45neutrons and36electrons. What i

1.	monoatomicanion of unitchargecontains45neutrons and36electrons. What is theatomicmas of the elementand inwhichgroup of theperiodictabledoes it lie ?
Answer» SOLUTION :No.Of neutrons of themonoatomic anion = 45 No. ofelectrons of the MONOATOMICANION = 36`:. `No. of electronsof the monoatomicatom= 36 -1 = 3 `:. ` ATOMICNUMBER of theatom `(Z= 35)`. Thereforethe atomis bromineand itbelongsto group17, i.e.,halogenfamily . No. ofprotons= No. of electrons=35 `:. `Atomicmass =No . ofneutrons +No. ofprotons= 45+ 35=80