4. Ferrous sulfate (FeSO4) is a compound essential
treat iron deficiency anemia. What are the elemn
compound?
a. fluorine, sulfur, and oxygen
b. fluorine, strontium, and oxygen
c. iron, sulfur, and oxygen
d. iron, strontium, and oxygen
5. The vertical column of elements in the period
Which of the following elements lişted belon
periodic table along with the elements-bery
strontium, and barium?​