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NCERT-STRUCTURE OF THE ATOM -EXERCISE
- Compare the properties of electrons, protons and neutrons.
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- What are the limitations of J.J. Thomson’s model of the atom?
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- Describe Rutherford atom model. What are the drawbacks of this model?
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- What are the postulates of Bohr's model of an atom?
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- Compare all the proposed models of an atom given in this chapter.
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- Summarise the rules for writing of distribution of electrons in variou...
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- Define valency by taking examples of silicon and oxygen.
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- Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isoto...
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- Na^(+) has completely filled K and L shells. Explain.
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- Calculate the atomic mass (average) of chlorine using the following da...
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- A sample of oxygen atoms contain only .(8)O^(16) and .(8)O^(18) isotop...
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- If Z = 3, what would be the valency of the element? Also, name the ele...
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- Composition of the nuclei of two atomic species X and Y are given as u...
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- A neutron is formed by an electron and a proton combining together. Th...
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- The mass of an electron is about (1)/(2000) times that of proton.
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- An isotope of iodine is used for making tincture iodine, which is used...
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- Rutherford's experiment on the scattering of alpha particle showed for...
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- Isotopes of an element have
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- Number of valence electrons in Cl^(– ) ion are:
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- Which one of the following is a correct electronic configuration of so...
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