Edexcel IGCSE Chemistry Principles of chemistry topic questions

Principles of chemistry builds the foundations for the rest of the course: particles, mixtures, atoms, the Periodic Table, calculations, bonding and electrolysis.

Edexcel IGCSE Chemistry Topic 1

Topic Overview

Principles of chemistry builds the foundations for the rest of the course: particles, mixtures, atoms, the Periodic Table, calculations, bonding and electrolysis.

Keep definitions precise, show calculation working clearly, and connect structure to properties whenever the question asks why.

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Question Types In This Topic

  1. Recall and classification questions on particles, mixtures, atoms, elements and compounds.
  2. Table, diagram and structure questions, including dot-and-cross diagrams and bonding explanations.
  3. Calculation questions involving formulae, equations, relative masses, moles, yields and gas volumes.
  4. Practical and interpretation questions on chromatography, solubility, empirical formulae and electrolysis.

Subtopics In Principles of chemistry

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1.a States of matter understand the three states of matter in terms of the arrangement, movement and energy of the particles understand the interconversions between the three states of... 1.b Elements, compounds and mixtures understand how to classify a substance as an element, compound or mixture understand that a pure substance has a fixed melting and boiling point, but that a mixture may... 1.c Atomic structure know what is meant by the terms atom and molecule know the structure of an atom in terms of the positions, relative masses and relative charges of sub-atomic particles... 1.d The Periodic Table understand how elements are arranged in the Periodic Table: in order of atomic number in groups and periods. understand how to deduce the electronic configurations of... 1.e Chemical formulae, equations and calculations write word equations and balanced chemical equations (including state symbols): for reactions studied in this specification for unfamiliar reactions where suitable... 1.f Ionic bonding understand how ions are formed by electron loss or gain know the charges of these ions: metals in Groups 1, 2 and 3 non-metals in Groups 5, 6 and 7 Ag+, Cu2+, Fe2+... 1.g Covalent bonding know that a covalent bond is formed between atoms by the sharing of a pair of electrons understand covalent bonds in terms of electrostatic attractions understand how to... 1.h Metallic bonding know how to represent a metallic lattice by a 2-D diagram understand metallic bonding in terms of electrostatic attractions explain typical physical properties of... 1.i Electrolysis understand why covalent compounds do not conduct electricity understand why ionic compounds conduct electricity only when molten or in aqueous solution know that anion...

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