Which one are only compounds? *

a. Steam (H2O), blood, mercury (Hg)
b. Iron (II) sulfide (FeS), Calcium oxide (CaO), Salt (NaCl)
c. Steel, milk, Chlorine gas (Cl2)
d. Gold (Au), bromine gas (Br2), Iodine gas (I2)

Respuesta :

paulos

c, steel , milk, chlorine gas because all the other choices has a metal.

Answer:

steel milk because it has the compounde