which element is least likely to form chemical bonds?\nphosphorus (p)\nhelium (he)\nsodium (na)\ncarbon (c)

Brief Explanations:

Helium is a noble - gas with a full outer electron shell (2 electrons in its first and only shell). Noble gases are chemically inert and have a very low tendency to form chemical bonds as they already have a stable electron configuration. Phosphorus, sodium, and carbon have incomplete outer electron shells and are more likely to form bonds to achieve a stable configuration.

Answer:

helium (He)