" 5) State the modern periodic law."

(i) Classify as basic amphoteric or acidic. BeO, Al_(2)O_(3), CaO,SiO_(2) . (ii) State the modern periodic law.

State modern periodic law.

State modern periodic law.

State modern periodic law.

Answer the following questions: State the modern periodic law.

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

(a) state the modern periodic law. (b) Describe in brief the main features of the long form of the periodic table.

State Modern periodic law.