Divide into two groups: nitrogen, ammonia, hydrogen, helium, oxygen, ozone, hydrogen sulfide, chlorine.
| December 30, 2020 | education
Group 1). Simple substances:
Nitrogen, hydrogen, helium, oxygen, chlorine, ozone.
Group 2). Complex substances :.
Ammonia, hydrogen sulfide.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
