Which of the following correctly describes isotopes of the same element?

A. Atoms that have the same number of neutrons but a different number of electrons

B. Atoms that have the same number of protons but a different number of neutrons.

C. Atoms that have the same number of protons but a different number of electrons.

D. Atoms that have the same number of neutrons but a different number of protons.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.