Which elements does not exist as a diatomic molecule?

Neon

Explanation:

The common elements that exist as diatomic molecules at room temperature are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. Therefore, the element that does not exist as a diatomic molecule is neon.

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.