Casey is given a sample mixture. Which component could be separated with a magnet?
A) calcium carbonate
B) glucose
C) iron filings
D) silica sand

Ithink that the answer is b

Bromine has atomic number  35  which means there are  35 protons  and  44  neutrons to give a total of 79 nucleons. the fact that it's a positive ion means that it has lost an electron; so there'll be  34 electrons. 

Meaningless question