Which surface exhibits the highest albedo measurement
a. sand
b. forest cover
c. bare soil
d. fresh snow

The correct answer is option D, that is, fresh snow.

Explanation:

Albedo refers to the amount of the diffuse reflection of the solar radiation out of the whole solar radiation received by a planet like Earth, that is, an astronomical body. It is dimensionless and is determined on a scale from 0 to 1.  

The albedo is the determination of the reflectivity. Of the given options, the fresh snow that forms the top covering of the ground exhibits the greatest reflectivity, therefore, the albedo measurement would be highest here.  

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.