What type of atom is an atom with 9 protons, 9 neutrons, and 10 electrons a. ion b. a normal atom c. isotope

What overall charge must all compounds have

What reaction is taking place? 02 + c3h8 = h20 + co2

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.