A chemistry student makes careful observations and measurements of a small sample of matter ,and determines the following The student determines that the unknown substance is gallium .which of the following is an extensive property of the gallium sample

Mass and volume

Explanation:

An extensive property of a substance is one that does depend on the amount of substance it contains.

Mass and volume are typical extensive property of any substance.

Therefore, mass and volume are typical extensive properties.

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.