All of the following require breaking and forming chemical bonds except

freezing ice

a plant decaying

a piece of silver tarnishing

roasting a marshmallow

What mineral is this? Egg-sized piece. Transparent pink color with glassy luster. Shows conchoidal fracture. The hardness is 7.

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When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as: A. Hund's rule B.

Why is it important to avoid consuming sugar?

What does 5ppm of nitrate in water mean? What does it cause? Is it healthy? Etc.

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level? Select one: a. helium (He) b. fluorine (F) c. carbon (C) d. nitrogen (N)

End-users of natural gas include (check all that apply) :

Angle of incidence and refraction for air at 0 degrees?

Which formula represents a solution? No explanation needed.