A sealed, flexible container held 250 mL of a substance. The volume of the container was then decreased to 100 mL without any matter escaping. What must be true about the matter in the container before the container's volume was changed? A.
Its particles were in constant, rapid motion.
B.
It was all located at the bottom of the container.
C.
Its particles were held together tightly in a rigid structure.
D.
It would have kept its shape if transferred to another container.

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answer: your mm

explanation:

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.