The first ionisation enthalpy values of third period elements Na , Mg and Si are respectively 496,737and 786 kj/mol whether the first ionisation enthalpy value for Al will be more close to 575 or 760 kJ`mol^(-1)` ? Justify your answer

Would you expect the first ionisation enthalpies for two isotopes of the same element to he the same or different? Justify your answer.

What will be the order of Na, Mg, Al and Si in terms of first ionisation enthalpy?

The first ionisation potential of Na is 5.1 eV the value of electron gain enthalpy of Na^+ will be

Arrange the following elements in the increasing order of their first ionisation enthalpy. Li, Be, Na, Mg.

Arrange the following elements in the increasing order of their first ionisation enthalpy : Li, Be, Na, Mg.

Answer the following questions : Which element of the first transition series has highest third ionisation enthalpy ?

Ionisation enthalpy values of Se, Br, Te and I are 869, 941, 1191 and 1142kJ *mol^(-1) . The values are not arranged in the correct order. Predict for which elements the ionisation enthalpy value is 869 kJ *mol^(-1) and 1142 kJ*mol^(-1) respectively.