Responses
Helium atoms have valence electrons in the first energy level, while atoms of the other elements in the group have valence electrons in the second energy level.
Helium atoms have valence electrons in the first energy level, while atoms of the other elements in the group have valence electrons in the second energy level.
Helium atoms have 2 electrons, while atoms of the other elements in the group all have 18 electrons.
Helium atoms have 2 electrons, while atoms of the other elements in the group all have 18 electrons.
Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.
Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.
Helium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level.
1 answer
The correct response is:
Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.
This is because helium is unique among the noble gases in that it has only 2 valence electrons (filling its first energy level), while all other noble gases have 8 valence electrons (filling their outer energy levels).
