If a person is suffering from the deficiency of nor-adrenaline, what kind of drug can be suggested?

Identify the correct molecular picture showing that happens at the critical micellar concentration (CMC) of an aqueous solution of a surfactant ( ◍ polar head; ∼ non-polar tail; ● water).

The correct electronic configuration and spin-only
magnetic moment (BM) of Gd³⁺ (Z = 64), respectively, are :

The condition that indicates a polluted environment is :