About when was the Romantic period in music?

About when was the Classical period in music?

What period of music did Mozart compose during?

What period of music did Bach compose during?

What period of music did Tchaikovsky compose during?

What period of music did Shostakovich compose during?

Which period of music is characterized by excessive ornaments and trills?

Which period of music is characterized by adherence to strict compositional rules?

Which period of music is characterized by "harsh" notes and atonality?