Give a situation that could produce ultraviolet radiation. Use the notation "x to y" where x and y are numbers from levels n = x to n = y...do not include the quotes in your answer.

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o

Which of the following is the best name for a compound made from calcium and bromine? (cabr2) calcium bromide calcium dibromide monocalcium dibromide calcium bromine ii

Which of the following subject areas contains questions that can be answered by science? alchemy ethics forensics politics