The most reactive metal groups on the periodic table are... Groups I & II
Groups II & III
Groups VI & VIII
Group VII & VIII

Can someone me with questions 12 and 13 plz.

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.

Why does asexual reproduction result in offspring with identicle genetic variation