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How many electrons are present in the sp...

How many electrons are present in the species `He^(2+)` ions? Suggest another name for it.

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`He^(2+)` ion has no electrons. It is also called alpha `(alpha)` particle.
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DINESH PUBLICATION-STRUCTURE OF ATOM -Very Short Answer Questions
  1. Out of the three sub atomic particles known which is called universal ...

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  2. Name a species which has (i) one proton and one electron (ii) one prot...

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  3. How many electrons are present in the species He^(2+) ions? Suggest an...

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  4. How many times is radius of extra unclear protiion more than that of t...

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  5. Is atomic number of an atom alwayus equal to the number of electons?

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  6. Out of proton and neutron which is heavier?

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  7. Explain why chlorine has relative atomic mass of about 35.5 u?

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  8. Why is proton so named?

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  9. The cation is represented as M^(3+) .What is the difference between th...

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  10. If k and L shells of an atom are completely filled what will be its na...

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  11. Do isobars have also identical chemical characteristics like isotopes?

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  12. The electoni configuration of an element is : 2(K),8(L),5(M). Predict ...

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  13. What are the postulates of Bohr's model of an atom?

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  14. What is the basic difference between the isotopes of an elements?

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  15. The element aluminium is written by the symbol overset(27)underset(13)...

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  16. What is the number of electrons in the valence shell of chlorine (Z-17...

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  17. The radioactive isotope used in the treatment of cancer is :

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  18. Out of c-12 and c-14 isotopes of carbon which is of radioactive nature...

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  19. If an atom has one proton and one electron state the charge on the ato...

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  20. The electronic configuration of an element Z is 2,8,6.How many electon...

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