text: Law of Triad, Law of Octaves, Mendeleev's Periodic Table, not very important but yes sometimes ಕೇಳಿದ್ದಾರೆ Law of Triads ನ state ಮಾಡಿ ಅಂತ ಹೇಳಿ. Very very important is this. What is ionization enthalpy?