HELP ME PLS I NEED IT FOR TODAY BY THE END OF THE DAY PLS Which of the following best describes infrared light?
visible radiation with a frequency that is lower than that of red light
o
visible radiation with a frequency that is higher than that of red light
invisible radiation with a frequency that is lower than that of red light
O
invisible radiation with a frequency that is higher than that of red light

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 dissolution of polymer can be thermodynamically described in 2 steps.