You need to check the pool water's pH to make sure it is between 7 and 7.6. If it's above or below that, you need to add the appropriate chemicals to return the water's pH to this range. Let's see what you know about keeping up your pool! (1) What is pH, what do you use to test it, and why would it be important to keep the pH of swimming-pool water between 7 and 7.6? * Your answer

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.

the correct answer would be d. hope this !