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How many neutrons are present in .(18)^(...

How many neutrons are present in `._(18)^(40)Ca` ?

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DINESH PUBLICATION-STRUCTURE OF ATOM-Assignment
  1. How does a neutron differ from proton ?

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  2. Total charge on one mole of monovalent ion is equal to

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  3. How many neutrons are present in .(18)^(40)Ca ?

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  4. What is the nature of particles which constitute positive rays ?

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  5. Are mass number and atomic number of an element same in all respects ?

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  6. Do isotopes of an element possess different chemical properties ?

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  7. Name the three fundamental particles in an atom. Write the values of t...

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  8. Why is an electron called universal particle ?

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  9. Enlist four properties of cathode rays.

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  10. Define atomic number of an element. How is it related to the mass nu...

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  11. Define a neutron. Mention its mass and charge.

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  12. How are the following species related ? .(6)^(14)C , .(7)^(15)N , .(...

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  13. What are electromagnetic radiations ? Name two such radiations.

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  14. What is the common velocity of all electromagnetic waves ?

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  15. Define wave length. What is its S.I. unit ?

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  16. How are frequency and wavelength related to each other ?

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  17. Arrrange the following electromagnetic waves in the order of their inc...

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  18. Which of the following are not electro magnetic waves : (i) alpha-ra...

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  19. Define wave length , frequency and wave number. How is frequency relat...

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  20. What is the wavelength of a radiowave with frequency of 1200 kHz ?

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