Science Coordinate 0654: C3. Atoms, elements and compounds Topical Past Paper Questions
Cambridge IGCSE Science Coordinate (0654) past-paper questions on C3. Atoms, elements and compounds, free. This topic is frequently examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
(a) Anhydrous copper(II) sulfate, $ CuSO_{4} $, can be used to test for water. (i) Anhydrous copper(II) sulfate is a white solid. State the colour change when water is added to anhydrous copper(II) sulfate. $$ \text{white to} $$ (ii) The equation for the reaction that takes place…
(a) Table 6.1 shows some information about the particles in atoms. Complete Table 6.1. Table 6.1 (b) An ion of sodium is shown. [2] $$ \mathrm{^{23}_{11}Na^{+}} $$ Complete the sentence about this sodium ion. This sodium ion contains 11 protons, ..... electrons and ..... neutrons…
(a) A teacher investigates the reactions of the Group I metals, lithium, potassium and sodium, with water. Table 2.1 shows their results. Table 2.1 (i) Deduce the order of reactivity of the metals. ..... most reactive ..... least reactive [2] (ii) When potassium reacts with water…
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