1)why do the metal of group 1A, 2A ,3A do not need roman numerals? 2) Why do we need to use Roman Numerals in the names for Transition metals and Group 4A metals?
3)When a non-metal becomes an ion what changes about their names?
4)What elements and groups do not form ions?

cuz yeah efhghg

Explanation:

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.