Contents
Part 1 of 2
Salt and the bulb
identify
Try it yourself
A pupil tests lithium chloride, an ionic compound, with a bulb tester. Which samples light the bulb? Choose all that apply.
identify: name or select.
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Scope and sources
Cambridge IGCSE Chemistry 0620 · 2026–2028 v2 · Original learning materials.
Ions and ionic bonds (2.4 Core 1–4, Supplement 5–7): cations and anions, the ionic bond as a strong electrostatic attraction between oppositely charged ions, dot-and-cross diagrams for Group I with Group VII compounds and, in the Supplement, for other metallic and non-metallic elements, the high melting and boiling points of ionic compounds and their conduction when molten or aqueous but not when solid, the giant lattice of alternating ions, and how that structure explains the properties. Covalent bonds, giant covalent and metallic structures, writing formulae and naming compounds in general, and electrolysis are left to other modules.
Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.
Official Cambridge syllabus