The answer is B. 19 <span>✔
Its 19 because h</span><span> (atomic mass is4.02643(11) u) contains one proton and three </span>neutrons<span> in its nucleus. It is a highly unstable </span>isotope<span> of hydrogen. It has been synthesised in the laboratory by bombarding tritium with fast-moving deuterium nuclei.</span>
The direction oxygen goes is out of the cell. It secretes it.
Physical changes can affect physical properties.
Hoped this helped.
~Bob Ross®
D represents ion-dipole forces that are stronger than the force C.
Explanation:
D represents the ion-dipole force.
C represents the H-bonding forces.
ion-dipole force is a force that is due to electrostatic attraction and has a dipole between an ion and a neutral molecule.
It is electrostatic in nature.
A hydrogen bond is the force between the hydrogen with the electro negative atom of one molecule, to electro negative atom of some other molecule. such as: O, F, N
Ion dipole force is stronger than the H-bonding.