Ionization enthalpy and electron gain enthalpy
- Which of the following statements are true?A. Unlike Ga that has a very high melting point, Cs has a very low melting point.B. On Pauling scale, the electronegativity values of N and Cl are not the same.C. Ar, K^+, Cl^-, Ca^2+, and S^2- are all isoel… Answer: 2. C and E only Key idea: check each statement separately. A false: gallium melts at only about 30 °C, so it does not have a very hi... 1
- Arrange the following elements in increasing order of first ionization enthalpy:Li, Be, B, C, NChoose the correct answer from the options given below: Answer: 3. Li < B < Be < C < N Key idea: ionization enthalpy increases across a period, with exceptions at Be (filled 2s) and N (half-filled... 1
- For the second period elements the correct increasing order of first ionisation enthalpy is : Answer: 2. Li < B < Be < C < O < N < F < Ne First ionisation enthalpy generally increases across a period, with two exceptions in period 2.... 1
- In which of the following options the order of arrangement does not agree with the variation of property indicated against it ? Answer: 3. I < Br < Cl < F (increasing electron gain enthalpy) Key idea: compare each series with the real trend. Option 1: isoelectronic io... 1