A: calcium
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Which deduction about the element astatine, At, can be made from its position in Group VII?
Which pair of properties are both correct for a typical transition element?
What happens when zinc foil is placed in an aqueous solution of copper(II) sulfate?
The equation shows what happens in a redox reaction between iron(II) chloride and chlorine gas. 2FeCl2 + Cl2 → 2FeCl3…
Which acid and base react together to produce an insoluble salt?
A solution of fertiliser was tested as shown. Which ions must be present in the fertiliser?