His nature is very kind, and he is liked by everyone.

In chemistry class, I learned about the properties of iodine.

I like to study new languages.

I attended a math class today.

I will teach mathematics to new students tomorrow.

He is majoring in chemistry at university.

I disinfected the wound using iodine tincture.

He is an expert in chemistry.

Iodomethane is often used in chemical experiments.

The use of mobile phones is prohibited during class.