As one moves down the group from top to bottom then which of the following will not be observed?

On moving down the group from F to I , which of the following properties decreases ?

On moving down the group from F to I , which of the following properties decreases ?

In a group from top to bottom effective nuclear charge

The atomic size in a group from top to bottom _______

As we move from top to bottom in a group the metallic character :

BeO and Be(OH)_(2) are amphoteric while the oxides and hydroxides of other alkaline earth metals are basic. The solubility of hydroxides increases as we move down the group from Be to Ba but the solubility of sulphates and carbonates decreases in that order the thermal stability of carbonates and sulphates of alkaline earth metals increases from Be to Ba as we move from top to bottom in the group. The solubility in water of sulphates down the Be group is Be gt Mg gt Ca gt Sr gt Ba this is due to

Assertion: Metallic character of first group metals of Mordern periodic table increase on moving down the group. Reason: On moving top to bottom in first group in Modern periodic table, value of ionisation enthalpy continuously decreases.