1. On the basis of Rutherford’s model of an atom, protons (positively-charged particles) are present in the nucleus of an atom. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

    On the basis of Rutherford’s model of an atom, protons (positively-charged particles) are present
    in the nucleus of an atom.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

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  2. According to Thomson’s model of the atom, an atom consists of both negatively and positively charged particles. The negatively charged particles are embedded in the positively charged sphere. These negative and positive charges are equal in magnitude. Thus, by counterbalancing each other’s effect, tRead more

    According to Thomson’s model of the atom, an atom consists of both negatively and positively
    charged particles. The negatively charged particles are embedded in the positively charged sphere. These negative and positive charges are equal in magnitude. Thus, by counterbalancing each other’s effect, they make an atom neutral.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

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  3. An electron is a negatively charged particle, whereas a proton is a positively charged particle. The magnitude of their charges is equal. Therefore, an atom containing one electron and one proton will not carry any charge. Thus, it will be a neutral atom. For more answers visit to website: https://wRead more

    An electron is a negatively charged particle, whereas a proton is a positively charged particle.
    The magnitude of their charges is equal. Therefore, an atom containing one electron and one proton
    will not carry any charge. Thus, it will be a neutral atom.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

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  4. Canal rays are positively charged radiations. These rays consist of positively charged particles known as protons. They were discovered by Gold stein in 1886. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

    Canal rays are positively charged radiations. These rays consist of positively charged particles
    known as protons. They were discovered by Gold stein in 1886.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

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  5. (d) The correct electronic configuration of sodium is 2, 8, 1. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

    (d) The correct electronic configuration of sodium is 2, 8, 1.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

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