How wide does this grating need to be to allow you to resolve the two lines 589.00 and 589.59 nanometers, which are a well known pair of lines for sodium, in the second order (m=2)?

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro