Read pic and help plz

Becquerel expected to find ( he developed the photographic plate that had sun-exposed minerals on top of it. becquerel expected to find ( he developed the photographic plate that had been in the closed drawer.

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call