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State two observations which show that a...

State two observations which show that atom is not indivisible.

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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. What is a proton ? State its relative mass and charge.

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  2. How does a proton differ from an electron ?

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  3. State two observations which show that atom is not indivisible.

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  4. All the gases form cathode rays and anode rays when electricity is pas...

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  5. What do you understand by the term electronic configuration of an elem...

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  6. An element has an atomic number 12. How may electrons will be present ...

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  7. (a) What is the nucleus of an atom and what is the nature of charge on...

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  8. Name the particles used by Rutherford in his experiment on the discove...

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  9. An element has atomic number 13 and an atomic mass of 27 (a) How many...

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  10. Write the distribution of electrons in an atom of element whose atomic...

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  11. What is a neutron ? How does it differ from a neutron ?

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  12. Compare an electron, a proton and a neutron in respect of their relati...

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  13. What is a proton ? How does it differ from a neutron ?

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  14. Compare an electron and a proton in respect of mass and charge.

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  15. Compare a proton and a neutron in respect of mass and charge.

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  16. How does an electron differ from a neutron ?

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  17. State the location of electrons, protons, protons and neutrons in an a...

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  18. Fill in the following blanks :

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  19. Fill in the following blanks in respect of an atom of an element :

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  20. (a) Describe Thomson's model of the atom. Which subatomic particle was...

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