What is energy associated with fourth orbit of hydrogen atom?

$$\left(\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}\right)$$

Identify glycosidic linkages for formation of chain and branches respectively in amylopectin.

Which from following species does not have number of electrons similar to other three species?

What is the name of tert-butyl alcohol according to carbinol system?