What is true about a liquid that has been converted to its solid state?
a. the kinetic energy of its molecules has increased.
b. the kinetic energy of its molecules has decreased.
c. the kinetic energy of its molecules is unchanged.
d. the molecules of the solid do not have any kinetic energy.

The correct answer is option B

Explanation:

During change in state of matter energy of the molecules also changes.When any matter changes its state from liquid to solid the kinetic energy of the molecules of that matter also changes that is kinetic energy of the molecules decreases.Due to this decrease in kinetic energy the molecules of matter in their liquid state settle down and get converted into solid state.

Hence, the correct answer is option B.

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.