How do you find the sum of valence electrons

Some atoms are exceptions to the octet rule by having an expanded octet. which characteristic of needed for an atom to have an extended octet

Calculate the frequency 337.1 nm (wavelength of a nitrogen laser) with the final answer using 3 sig figs, and being in S^-1

How does salt dissolve in water?

4. A gas at 400 K is placed in a 4.0 L moveable piston. The gas is cooled to 252 K. a. What is the new volume in the piston?

List 3 elements tyat would have similar properties to chlorine

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

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is