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Find the energy relased (in junles) when...

Find the energy relased (in junles) when a doubly ionised helium `(He^(2+))` taken up two electron in form a helium atom in the ground state .The first ionisation energy of a helium atom is `3.4 xx 10^(-19) J`

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`IE`= ionisation energy of He
`IE_(1) = 3.4 xx 10^(-19) J`
`IE_(2) = IE `of `He^(o+)"ion" = 2.17 xx 10^(-18) xx (4) = 8.68 xx 10^(-18) J`
Total energy released
`IE_(1) + IE_(2) = (3.4 xx 10^(-19) + 8.68 xx 10^(-18))J = 90.2 xx 10^(-19) = 9.02 xx 10^(-18) J`
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CENGAGE CHEMISTRY ENGLISH-ATOMIC STRUCTURE-Concept Applicationexercise(4.3)
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  2. How many quantum number are needed in designate an orbital ? Name the...

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  3. The principal quantum number of n of an atomic orbitals is 5 what are ...

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  5. What is the lowest value of n that allows g orbital to exist?

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  6. Given the notation for the sub-shell deotected by the following quant...

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  10. Explain giving reasons, which of the following sets of quantum numbers...

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  11. How many electron in atom may have the following quantum number ? A n ...

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  12. How many orbitals are possible in a. 4th energy level b. 5f sub-she...

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  13. What are the possible values of l and m(1) for an atomic orbital 4f?

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  14. What is the shape of 1s and 2s orbital .Give two point of difference ...

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  15. (a) How many sub-shells are associated with n = 4? (b) How many electr...

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  16. How many spherical nodes are present in 4s orbital in a hydrogen ato...

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  17. The principal quantum number representwsw

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  19. The orbital angular momentum of an electron of an electron in 2s orbit...

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