Which of the following is NOT a halogen gas?

Question

Accepted Answer

Halogens are the elements in group 17 of the periodic table. Check each option:

1. $F$ (fluorine) — a halogen.
2. $He$ (helium) — a noble gas (group 18), not a halogen.
3. $Cl$ (chlorine) — a halogen.
4. $Br$ (bromine) — a halogen.

Therefore the element that is NOT a halogen is $He$, option (2), which corresponds to choice b.

FINAL_ANSWER: b

Answer

Answer

Answer