Which of the following describes an atomic property that makes some atoms useful for nuclear medicine applications and nuclear power generation? A.
Isotopes of an atom differ in the number of electrons they contain. Some isotopes are stable, and these are used in nuclear medicine and the generation of nuclear power.

B.
Isotopes of an atom differ in the number of neutrons they contain. Some isotopes are unstable, and these are used in nuclear medicine and the generation of nuclear power.

C.
Isotopes of an atom differ in the number of neutrons they contain. Some isotopes are stable, and these are used in nuclear medicine and the generation of nuclear power.

D.
Isotopes of an atom differ in the number of electrons they contain. Some isotopes are unstable, and these are used in nuclear medicine and the generation of nuclear power.

they both have a y in them

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

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