Question

Which of these atoms cannot serve as a central atom in a Lewis structure: (a) O; (b) He; (c) F; (d) H; (e) P? Explain.

Answer 1

The atom that cannot serve as a central atom in a Lewis structure are the He, F, and H. That is option B, C and D respectively.

What is a Lewis structure?

The Lewis structure is defined as the structure in chemistry that is used to represent the Valence electrons of an atom in dot forms.

The atoms that can not serve as central atom in a Lewis structure are the He, F, and H atoms. This is so because:

• Helium (1s2) is a noble gas, and as such, it does not need to bond to any other atoms.

• Hydrogen (1s1) and fluorine (1s22s22p5) only need one electron to complete their valence shells.

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