A group of students wanted to test the structural efficiency of a stool in Mr. Brown’s music room so they started piling on top of it. The stool has a mass of 3.5 kg, and combined, the students a mass of 268 kg.
At this point, what is the structural efficiency of the stool?

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.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;