Question 1
During the production of iron, the formation of CaSiO
3 (slag) from the reaction of CaO (lime) and SiO
2 (sand), shown below, facilitates the separation of the iron from the gangue.
CaO(s) + SiO2(s) → CaSiO3(l)
In this reaction the acidic oxide is ________ and the basic oxide is ________.
Question 2
The number of electrons that half fill a composite
s-
d band is ________.