Which is one way to determine whether a reaction was a chemical reaction or a nuclear reaction?

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

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?