The higher the order, the lower the entropy. Solids are most orderly and gases are least orderly, with liquids and aqueous in between. That said, NaCl(g) would have the highest entropy.
Answer: a. decrease from left to right in a period and increase down a group.
Explanation:
Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.
As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Thus, decreasing the atomic radii of the atom on moving towards right of the periodic table.
As moving from top to bottom in a group, there is an addition of shell around the nucleus and the outermost shell gets far away from the nucleus and hence, the distance between the nucleus and outermost shell increases. Thus, increasing the atomic radii of the atom.
In acidic solution,<u> [H₃O ] > [OH⁻]. </u> The correct option is C.
<h3>What is hydronium and hydroxide ion?</h3>
Hydronium ion is the simplest form of oxonium ion, and it is derived from the protonation of water. It is produced by dissolving the Arrhenius acid in water.
Hydroxide ion is a diatomic anion formed with oxygen and hydrogen with single covalent bond.
The concentration of hydronium ions in an acidic aqueous solution will be higher than the concentration of hydroxide (OH-) ions.
Thus, the correct option is C, <u>[H₃O ] > [OH⁻].</u>
Learn more about hydronium ion
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Clockwise so winds are deflected to the right as they move into a low pressure area in the northern hemisphere