Question
Write the resonance structures for
NO2.
NO2.
✓
Answer
The resonance structures are:
NO2
NO2
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Why are positive ions called cations, whereas negative ions are called anions?
The first $(\Delta_{1}\text{H}_{1})$ and the second $(\Delta_{1}\text{H}_{1})$ ionization enthalpies (in kJ mol–1) and the $(\Delta_{1}\text{H}_{1})$ electron gain enthalpy (in kJ mol–1) of a few elements are given below:
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| II | 419 | 3051 | -48 |
| III | 1681 | 3374 | -328 |
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| VI | 738 | 1451 | -40 |
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