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11. The diagrams show the electronic structure of four different atoms. a. Name the two sub -atomic particles in the nucleus of an atom. b. Why is there no overall electrical charge on each atom? c. Why is a tom A unreactive? d. Which two of these atoms have similar chemical properties? Give a reason for your answer.
Deduce the amounts of X(aq) and Y(aq) at equilibrium. On the grid below, draw a graph to show how the amount of Z(aq) changed from the time of initial mixing until 60 seconds had elapsed. X(aq) = 0.40 mol dm−3 and Z(aq) = 0.35 mol dm−3. For this reaction, the equilibrium constant Kc = 2.9 mol−2 dm6.
Hans decides to test an idea that the atom is made of a soft positive substance with hard specks of negative substance (the electrons) embedded in it. He sets up an __________ in which heavy positive particles will be fired into some gold atoms.
Questions and model answers on 1.2 Atoms, Molecules & Stoichiometry for the CIE A Level Chemistry syllabus, written by the Chemistry experts at Save My Exams.
Test your knowledge with these chemistry flashcards covering essential terms like matter, atoms, elements, and compounds. Perfect for preparing for the Aleks Placement Test in chemistry. Enhance your understanding of fundamental concepts in the subject.
