the sp² hybridized carbon atoms of alkenes and benzene rings are ____________ and absorb ____________ .
- 0-12
- 0-220
- 1:2:1
- 1:2:3
- 1:3:1
- chemical shift
- deshielded
- downfield
- equal
- higher
- left
- lower
- one
- right
- shielded
- signal intensity
- three
- two
- unequal
- upfield