why is helium less reactive than hydrogen? a. each helium atom has a full valence - electron shell, but each…

why is helium less reactive than hydrogen? a. each helium atom has a full valence - electron shell, but each hydrogen atom only has one. b. each helium atom has a full protonic power level, but each hydrogen atom only has one. c. each helium atom has four neutrons, but each hydrogen atom only has one. d. each helium atom has two electron - energy levels, but each hydrogen atom only has one.

why is helium less reactive than hydrogen? a. each helium atom has a full valence - electron shell, but each hydrogen atom only has one. b. each helium atom has a full protonic power level, but each hydrogen atom only has one. c. each helium atom has four neutrons, but each hydrogen atom only has one. d. each helium atom has two electron - energy levels, but each hydrogen atom only has one.

Answer

Brief Explanations:

Chemical reactivity is related to the electron - configuration of atoms. Helium has a full valence electron shell (2 electrons in the first shell), making it stable and less reactive. Hydrogen has only 1 valence electron and is more likely to participate in chemical reactions to achieve a stable electron - configuration.

Answer:

A. Each helium atom has a full valence electron shell, but each hydrogen atom only has one.