What is electron gain enthalpy? On what factors does it depend?

What is meant by electronegativity? On what factors does it depend?

Define inductive reactance. On what factors does it depend?

Define self inductane of a solenoid. On what factors does it depend ?

Define capacitive reactance. On what factors does it depend?

What is loudness of sound ? What factors does it depend on ?

What is the unit of enthalpy ?

Define mutual inductance between a pair of coil. On what factors does it depend ?

Which of the following will have the most negative electron gain enthalpy and which has the least negative? P, S, Cl, F. Explain your answer.