Hydrogen is in group 1a of the periodic table, known as the alkali metals, although it obviously isn't a metal. what is the reason for its placement in this group? a) hydrogen has the same electron configuration as alkali metals. b) hydrogen is a metal, but has an extremely low vaporization point. c) there isn't room for hydrogen on the right side of the table with other nonmetals. d) scientists didn't want to reconfigure the periodic table after they covered that hydrogen wasn't a metal.

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.