How many valence electrons does an atom of al possess?

In examining a protein molecule, you discover that it has not folded properly. Why is this alarming? This may impact the function of the protein, possibly causing disease or allergies.

A small gas cylinder of Helium can be used to fill many more balloons than would fit inside it. Explain how this works, in your own words. Use the ideal gas law.

Why is red the last color seen at sunset? a:It reflects off the atmosphere. b:It is scattered the least by the air. c:It is bent the most by the air. d:It is bent by raindrops.

If energy cannot be created or destroyed, how is it possible for the products to have more energy?

In your opinion, do the risks of using radioactive decay outweigh the benefits? Explain.

The molar mass of water (H2O) is 18.02 g/mol. Yun needs 0.025 mol H2O for a laboratory experiment. She calculates that she needs 72.0 g H2O for the experiment. Yun's calculation was incorrect because she set up her unit conversion incorrectly.

I'm doing isotope homework and I need the find the number of protons, neutrons, and electrons first one is chromium-58 and chromium-63

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid.

what mass of magnesium is required to react with excess nitrogen to produce 0.500 mol magnesium nitrade

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate