Student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are:
liquid a: the solid dissolves quickly.
liquid b: the solid appears unchanged.
liquid c: a brownish colored liquid is produced.
liquid d: fizzing occurs and the well becomes warmer.
in which well does a physical change occur?

well, they made a movie about how animals lived there.

rotten tomato score 95%

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b i think it’s a water wheel turning in a stream

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.

he would use the colour black