What is the English name for the element 'natrium'?

Sodium 

The correct answer is option 1. Sodium. 

The element commonly known as "natrium" is actually sodium. "Natrium" is the Latin name for sodium, and it was historically used in scientific literature. However, in English, the element is universally referred to as sodium.

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is a key element in many compounds and plays a vital role in various biological processes. It is essential for the proper functioning of nerves and muscles, as well as for maintaining fluid balance in the body.

Sodium compounds are widely used in industry and everyday life. Common sodium compounds include sodium chloride (table salt), sodium hydroxide (caustic soda), and sodium bicarbonate (baking soda).

In summary, "natrium" is the Latin name for the element with the chemical symbol Na and atomic number 11, which is commonly known as sodium in English.