Question

Passage - 2

If a small amount of energy is supplied to an atom then an electron may be promoted to a higher energy level but if the amount of energy supplied is sufficiently large the electron may be completely removed. This energy is called ionization energy. The ionization energy depends on the type of electron which is removed s, p, d and f electrons have orbitals with different shapes. An s-electron penetrates nearer to the nucleus and is therefore more tightly held than p-electron.

54. Write down the correct order of Ist, IInd and IIIrd ionization energy of nitrogen. *

I> II < III

I < II< III

55. An element with lowest ionization energy in III period. *

Sodium

Magnessium

56. An elements with highest ionization energy in III period. *

Chlorine

Argon

57. The graph of ionization energy and atomic number does not increase smoothly because:- *

the value of Be and Mg are high and this is attributed to the stability of a filled s level.

the value of N and P are high due to half filled p- orbital

both (a) and (b) are correct

None of these

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Answer 1

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