What happens when you react ascorbic
acid(vitamin c) with iodine.

When ascorbic acid reacts with iodine then acid reacts to oxidize which means loose electron while iodine reacts to reduce which means gain electron.

Explanation:

We know that ascorbic acid which consists of vitamin C is very crucial for the growth of teeth, bone, etc. It also helps in regulating the chemical reaction of cells in the body.

When ascorbic acid reacts with iodine then acid reacts to oxidize which means loose electron while iodine reacts to reduce which means gain electron.

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.