Consider a double-pane window with a gap in between to be filled with either helium, nitrogen or oxygen gas. At same temperature, which gas gives the highest radiation heat transfer through the window? Oxygen

All the same

Helium

Nitrogen

wher is the rest of the question

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.