Match the following vocabulary

1. An atom that has gained or lost one or more electrons
ion
2. An atom that has lost electrons – usually metals
acid
3. An atom that has gained electrons – usually non-metals
covalent compound
4. A compound made out of all non-metal elements
ionic compound
5. Either the cation or the anion in the compound are made from a group of elements
cation
6. A compound that can donate a proton
anion
7. A compound made out of a cation and an anion
polyatomic ionic compound

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.