Which of the following four fatty acids has the lowest melting point? 1. сњењењењенгсоон г. сњењењењењењењењењеоон 3. ch3ch2ch2ch2ch2ch2ch2cooh ch3ch-chch2ch2cooh a. 1 b. 2

Option (1) is the correct answer.

Explanation:

Melting point is defined as the point at which a solid state of a substance starts to melt and it converts into liquid state.

Also, it is known that more is the number of linear carbon atoms attached to each other, more is the melting point of a substance. Whereas more is the branching present in a compound least will be its melting point.

For example, has only 5 carbon atoms attached to carboxylic acid group. Whereas has 9 carbon atoms attached to carboxylic acid group.

Therefore, compound will have low melting point.

Thus, we can conclude that out of the given options, fatty acid has the lowest melting point.

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.