Water is an amphoteric substance because it can receive and donate hydrogen ions. True or False?

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Which statement describes james chadwick’s discovery.

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.