A periodic table was first prepared on the basis of ________ in ascending order? Allah has created this universe from some basic units called _________? How elements were grouped in the beginning? In beginning efforts were made to group the elements on the basis of ______? What is penultimate? Define Doberiener's Law of triads? Define a solution? A homogeneous compound of different chemical substances throughout and shows uniform physical characteristics. Solute Chapter 7 Solution and Ssuspension icles are completely harmonized in the solvent and are not visible by naked eye and ---------- separated by filtration. What is binary solution? A solution formed by only two substances is a?