In which isotope is the strong nuclear force not strong enough to balance electrostatic forces between protons? . a. carbon-13. b. hydrogen-2. c. neon-21. d. uranium-238

D. uranium-238

The correct answer is option D, that is, uranium-238.

Explanation:

In all the nuclei above atomic number 83, the nuclear force is not adequately strong to poise the electrostatic repulsion among the protons. The nuclei like carbon-13, hydrogen-2 and neon-21 are all stable. However, the elements like uranium-238 are radioactive and exhibit a half-life of approximately 4.5 billion years.  

In order for the atom to be stable, it should exhibit a sufficient amount of binding energy to keep its nucleus with each other perpetually. An atom that is not stable is devoid of enough amount of binding energy to sustain its nucleus perpetually, and therefore, goes through decay in order to attain stability. Uranium-238 is an illustration of such an atom that may go through decay to attain stability.  

false

because it does not have the potential to be entirely used up

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .