2. Now that we have a table of wavelengths for each metal cation, let's identify the metals in an unknown mixture of salts. In the video player below, what metal cations are present? Select all that apply: Na+ Li+ Sr2+ K+​

How much energy is made when a pice of wood burns. how do you know

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Acontrol during an experiment. might change remains constant does not exist does change