D: Ca2+ and Sc³+
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The diagram shows the structures of the atoms of elements L and M. The elements combine to form a compound. What is t…
Element Q is in Period 3 of the Periodic Table. It can form ions with the formula Q³⁻. Which element is most likely t…
A particle contains 34 protons, 45 neutrons and 36 electrons. Which symbol is correct for this particle?
A simple cell is shown below. Which statement about the process occurring when the cell is in operation is correct?
The usual conditions for the Haber process are 250 atm pressure, 450°C and an iron catalyst. Which change in conditio…
Chlorine can be manufactured by the following reaction. 4HCl(g) + O2(g) ⇌ 2H2O(g) + 2Cl2(g) ΔH is negative A mixture …