4. (08.01 MC) Which of the following describes a property of water that helps sustain marine life forms? (5 points)
Open spaces in water's solid structure makes its solid state less dense than its liquid state.

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Water contracts on cooling below 4 °C, lowering its density until it reaches 0 °C.

Water freezes from bottom to top, which allows it to form a solid layer of ice only at the bottom of rivers and lakes.

Water has a very low specific heat capacity, allowing it to heat up quickly.

c is the answer because when something is left after something evaporates that shows the chemical change.

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.

false it is never safe to stand on the top step of a ladder provided it is braced properly.