Alog has a density of .8 g/cm³. this log will in freshwater, which has a density of 1.0 g/cm³ .

move

float

move deeper

decrease density

The log will float because it is less dense

Answer is: This log will float in freshwater.

d(log) = 0.8 g/cm³; density of log.

d(water) = 1.0 g/cm³; density of water.

Log has lower density of water, so it will float in water.

Density of a substance is its mass per unit volume.

The SI derived unit for density is the kilogram/cubic meter, but chemist usually use gram per cubic centimeter.

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.