Which best describes the results of becquerel’s experiments?

when placed in sunlight, the uranium did not form an image and when placed in darkness, the uranium did form an image.
when placed in sunlight, the uranium did form an image and when placed in darkness, the uranium did not form an image.
both formed images when placed in their respective places.
neither formed images when placed in their respective places.

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.

did anyone actually do this? like if anyone has submitted this i rly need .