g Identify the molecular geometry corresponding to each expected bond angle around the central atom. 120 ∘ Trigonal planar 109.5 ∘ Trigonal pyramidal 107 ∘ Tetrahedral 180 ∘ Linear

oh it is true if thats what you are asking

the answer for sodium is 0.186

the answer for rubidium is 0.251

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.