Question

PLEASE!!!!

How many protons, neutrons, and electrons does rubidium-87 contain? *

A) 87 protons, 85.5 neutrons, 87 electrons

B) 37 protons, 37 neutrons, 37 electrons

C) 37 protons, 87 neutrons, 37 electrons

D) 37 protons, 40 neutrons, 37 electrons

Answer 1

it's d. taking the test and you have a typo. D should be 50 neutrons not 40

Answer 2

The answer the comes closest to being correct would be answer choice D. the problem with it though is that it does not have the correct amout of neurtrons. It is called rubidium 87 therefor there must be 50 neurtrons if there are 37 electrons and protons 87-37=50, 50+37=87.