What is the difference between science and pseudoscience
a. science is done only in a laboratory, while pseudoscience is done in the "real world.
b. scientific claims can be verified through observation and experimentation, while pseudoscientific claims cannot.
c. scientific claims are biased, while pseudoscientific claims are unbiased while
d. pseudoscience is based on empirical evidence, while science is based on observation and e based on observation and experimentation.

B. Scientific claims can be verified through observation and experimentation, while pseudoscientific claims cannot.   At least I think it is right.

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.