If you have 90 ml of water mixed with 10 ml of pollutant the concentration of pollutant is a: 1:1 b: 1:10 c: 20:500 d: 1:1000

Noble gases are the most reactive elements on the periodic table. a. true b. false

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

What best discribes the relationship between wavelength and frequency in a electromagnetic wave