Optrion A: when trying to determine a star's chemical composition.
Because unique atomic emission spectrum, analyzing the emission spectrum you can tell the chemical composition.
b is your best bet hope this helps
Protective Action Zone is the range instantly neighboring and downwind from the underlying seclusion zone; this zone is in inevitable risk of being defiled via airborne vapors inside 30 minutes of material discharge. Physically securing and keeping up the crisis scene by building up borders and defensive activity zones and denying section to unapproved people.
There are two H2 .There are four nitrogen atoms present. There are two NH3 formed
I love these type of questions :)
Final Answer: Neon
