1. Arrange the following solutions in order of decreasing freezing point; i. 0.3 m potassium chloride, KCI
ii. 0.5 m urea, (NH2)2CO
iii. 0.3 m glucose

a) the particles of the chair are strongly held together.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.