The smaller the mass of an object, the its inertia

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine