Question

which elements lewis dot diagram is incorrect? li ·b· he: ·c· lithium helium carbon boron

Explanation:

Lewis dot diagrams represent the valence electrons of an element. Lithium (Li) has 1 valence electron, and its Lewis dot diagram should have 1 dot. Boron (B) has 3 valence electrons, carbon (C) has 4 valence electrons, and helium (He) has 2 valence electrons (a full shell for the first energy level). The Lewis dot diagram for helium shown is incorrect as it has 3 dots instead of 2.

Answer:

helium