Question

To attend world science seminar, A famous chemist from Russia visit
Tokyo(Japan). In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "Austin, Wayne, Dege, Oscaru, Lingard, and Rojo. H,He,Li,Be,C"

A local detective L Lawliet was called to solve the case,

After reading the note, L Lawliet instantly asked the police to arrest the murderers.

Who is the murderer?

Answer 1

Answer:

Lingard is the killer.

Answer 2

what is H,He,Li,Be,C ???