State the modern periodic law of elements.

Who introduced the periodic law of elements for the first time? State the law.

Mosely modified Mendeleev's periodic law based on his observation on the X-ray spectra of elements. State the modern periodic law.

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.

Boron, Aluminium, Gallium, Indium and Thallium belong to group 13 of the periodic table of elements. State whether the compound BCI_3 is acidic or basic

Boron, Aluminium, Gallium, Indium and Thallium belong to group 13 of the periodic table of elements. Write the hybridization state of B in BF_3

State and explain modern periodic table and modern periodic law?