How do you define energy ?

What do you meabn by energy level diagram for hydrogen atom/

How do we define momentum of particle? State its S.I unit.

How do we get energy?

How do you find work done, heat transferred and the change in internal energy for an isobaric process?

How do you perceive the colour of an object?

How do atomic radius vary in a period and in a group? How do you explain the variation?

How do you get ideal gas equation from the gas laws?

An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and mango tree?

Define Uniport, Symport and Antiport, Do they require energy?