4. Magnesium and oxygen reaction to create 55 grams of magnesium oxide. How many grams of oxygen was used in this chemical reaction?
Mg + O2 → Mgo

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table.state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?