ろくフッ ふっか硫黄 いおうではありませんでした
roku fukkai ōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 六フッ化硫黄

1. It was not sulfur hexafluoride.

Past/Perfective
Negative
Polite
Formal Register
Chemistry