Gas A: 5 liters at 20 °C Gas B: 5 liters at 10 °C
Gas C: 5 liters at 40 °C
Gas D: 5 liters at 30 °C

Which gas has the greatest average molecular kinetic energy?

Gas A
Gas B
Gas C
Gas D

distance, luminosity, brightness, radius, chemical composition, and temperature

the answer to your question is c

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.