(1 kg = 1000 g, 1 m3 = 106 cm3) acetone is a flammable solvent used in the making of plastics. the density of acetone is 790 kg/m3. to convert 790 kg/m3 to g/cm3, 1,000 and 106. these operations reveal that the density of acetone in g/cm3 is .

0.790 g/cm3

Explanation:

its first and third is your answer i did the qustion the fourth isnt right

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.