19.What is the general trend for ionization enthalpies of alkali metals as we move down the group? [A] it increases [B] it decreases [C] it is same for all [D] None Show Answer
Trends in ionization enthalpy in a group: The first ionization enthalpy of elements decreases as we move down in a group. While moving down in a group, the atomic number increases and the number of shells also increases.
IE decreases on moving down the group as the atomic radii increases and the outer electrons moves farther away from nucleus and the electron is not tightly bound to nucleus.
