10 points You will need to refer to your periodic table to answer this
question. Which of these groups (columns) in the periodic table is made
up primarily of elements that are gases at room temperature?"
Group 1
Group 2
O Group 17
O Group 18

Iwill give brainliest if you answer right : )

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?