NSEJS · Chemistry

Structure of the Atom

Discovery of subatomic particles, Thomson, Rutherford and Bohr models, isotopes and isobars.

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  • Q1 · Structure of the Atom · HARD

    An element X has electronic configuration 2, 8, 7. When it forms an ion, how many electrons will be present in the outermost shell of the ion?

  • Q2 · Structure of the Atom · EASY

    Which subatomic particle was discovered by J.J. Thomson through cathode ray experiments?

  • Q3 · Structure of the Atom · EASY

    In Rutherford's alpha particle scattering experiment, most alpha particles passed straight through the gold foil. This observation led to the conclusion that:

  • Q4 · Structure of the Atom · MEDIUM

    Isotopes of an element have the same number of:

  • Q5 · Structure of the Atom · MEDIUM

    An atom has 17 protons and 18 neutrons. What is its mass number?

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