Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?(1 point) 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 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 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 a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level.

Question

what is 100% the correct option, select the correct answer

Answer 1

The correct option is:

Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.

This statement accurately distinguishes helium from the other noble gases in group 18, as helium's outer electron configuration consists of only 2 electrons, while the other noble gases have a complete octet with 8 valence electrons.