A global positioning satellite transmits a radio wave with a wavelength of 19 cm. What is the frequency of the radio wave?

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?