Question

recall the gases produced by volcanic activity formed the earths early atmosphere?

Answer 1

Early Earth's atmosphere:
Gases produced were probably similar to those
created by modern volcanoes (H2O, CO2, SO2, CO, S2, Cl2, N2, H2) and NH3
(ammonia) and CH4 (methane)
No free O2 at this time (not found in volcanic
gases).