How does oxygen obey the octet rule when reacting to form compounds? a) it gains electrons. b) it gives up electrons. c) it does not change its number of electrons. d) oxygen does not obey the octet rule.

a ) it gains electrons

Option (A) is the correct answer.

Explanation:

According to the octet rule, every atom has the tendency to completely fill its octet and for that it needs to occupy eight electrons in its valence shell.

For example, atomic number of oxygen atom is 8 and its electronic distribution is 2, 6.

And in order to completely fill its valence shell and attain stability an oxygen atom needs to gain two electrons from another atom.

Thus, we can conclude that oxygen obey the octet rule when reacting to form compounds as it gains electrons.

the answer for sodium is 0.186

the answer for rubidium is 0.251

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.