Chemistry 0620: ATOMS AND ELEMENTS Topical Past Paper Questions

This question is about elements. **(a)** Identify an element that: > **(i)** is approximately 21% of clean, dry air [1] > > **(ii)** is in Group 1 and Period 4 of the Periodic Table [1] > > **(iii)** contains atoms with exactly 24 protons [1] > > **(iv)** removes tastes and odour…

Atoms and ions are made from particles called electrons, neutrons and protons. (a) Complete Table 1.1. Table 1.1 [2] (b) Table 1.2 shows information about some atoms or ions. Complete Table 1.2. Table 1.2 [5] (c) (i) The relative atomic mass, $A_r$, of an element is the average m…

Iron ore contains iron(III) oxide, Fe₂O₃. A blast furnace is used to extract iron from Fe₂O₃. Equations for some of the reactions in the blast furnace are shown. equation 1 $ \mathrm{C} + \mathrm{O}_2 \rightarrow \mathrm{CO}_2 $ equation 2 $ \mathrm{CaCO}_3 \rightarrow \mathrm{Ca…