I anm definitely not a halogen. But if all you knew about me was my atomic mass (not my atomic number or properties).
then you might expect me to be located one element over in
the halogen family. Who am I?

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)