The fourth part of the sixth group of major crimes is related to the periodic table of elements.

Deceased: Junior 3 student: Long Xiaowu

Cause of death: falling from the building

Clue: one mid-term table and four in hand.

Hydrogen, helium, neon and iron

Atomic number: the symbol of an element

1 H hydrogen

2 He helium

10 northeast northeast

26 Fe iron

What do you mean? I don't know

Specific location: Episodes 2 1 22, Part 4, Group 6, Major Crimes Unit.

If you are satisfied, please accept it. Thank you.