Basicity of hydroxides of lanthanoids decreases along the period from left to right. Explain the reason.

The statement that is not correct for the periodic classification of elements is The properties of elements are periodic functions of their atomic numbers. Non-metallic elements are lesser in number than metallic elements. Electronegativity of the elements along the period from left to right increases in a regular manner. For transition elements the d-subshells are filled with the electrons monotonically with increase in atomic number.

Account for the following: Atomic radius decreases from left to right in a period

Consider the following statements in respect of lanthanides: The basic strength of hydroxides of lanthanides increases from La(OH)_3, " to Lu " (OH)_3 , The lanthanide ions Lu^(3+), Yb(2+) " and " Ce^(4+) are diamagnetic. Which of the statement(s) given above is/are correct?

The doctor prescribed to use antacid for a person who was suffering from acidity in the stomach. Explain the reason for acidity in the stomach.

You might have observed the bubbles of steam coming from bottom of vessel when water is heated.These bubbles disappear as it reaches top of liquid just before boiling and they reach the surface at the time of boiling.Explain the reason.

The first ionisation enthalpies of second period elements generally increase from left to right along the period. Give reason for this general trend.

Name of elements with atomic numbers greater than 100 are given by IUPAC the first inoisation enthalpies of second period element generally increase from lewft to right along the period. Give reason for this general trend.