D: Determine which of the following electron configurations represents an element with lower reactivity compared to the other element. Record the period and group of that element in the grid, putting period number first, followed by a space, followed by the group number.
1s^2 2s^2 2p^6 3s^2 3p^2
1s^2 2s^2 2p^6

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.