放射 ほうしゃ せい核種 かくしゅじゃないです
hōshaseikakushujanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 放射性核種

1. It's not a radioactive nuclide.; It's not a radioisotope.

Negative
Polite
Casual Register
Physics