Question

1. choose the best answer.

what was the earliest form of a periodic table?
alpha helix
alkali helix
oxygenic helix
telluric helix

Explanation:

The telluric helix was an early attempt to organize the elements. It was proposed by Alexandre - Emile Béguyer de Chancourtois. The alpha helix is a common secondary structure in proteins in biology. Alkali refers to alkali metals in chemistry but "alkali helix" is not a term related to the early periodic table. "Oxygenic helix" is not a valid term in the context of early periodic table forms.

Answer:

telluric helix