Home › CBSE Class 10 › Chemistry › Alcohols Phenols Ethers › Which trend is followed by ionisation energy acr…
Which trend is followed by ionisation energy across a period?
AContinuously increases
BGenerally increases with some dips
CContinuously decreases
DHas no clear pattern in the standard view
Answer & Solution
Correct answer: B. Generally increases with some dips
1. Ionisation energy rises with nuclear charge across a period.
2. There are exceptions where the configuration is especially stable.
3. Group 13 dips below Group 2; Group 16 dips below Group 15.
4. So the trend is rising overall with small dips at known positions.
5. Hence the general statement 'increases with some dips' is correct.
_Source: NCERT Class 10 Science Ch 5 'Periodic Classification of Elements'_
Related questions
Besides VSEPR and the Kossel Lewis approach, which two theories are listed?Which theory is abbreviated VSEPR?Why can lattice enthalpy not be calculated directly from attraction and repulsion alone?Ionic bonds form most easily between elements with low ionization enthalpies and high negaWhat is the lattice enthalpy of sodium chloride?Lattice enthalpy is the energy required to separate one mole of an ionic solid into:The structures contributing to a resonance hybrid are called:Why was the concept of resonance introduced?