Define second.

Define a second in terms of vibrations of caisium -133 atom.

Define one second.

Define one second.

Curie is defined as the quantity of radioactive substance which gives ___________ disintegrations per second.

Define the SI unit of time. (or) What is one second in SI system of units?

Define th SI unit of electric current. (or) What is one second in SI system of units? (or) Define one ampere (S.I standard for current)

Define rate constant, Write units of rate constant for fist and second order reactions.